src/seshigh.c

   1 /*
   2  * Copyright (C) 1995-2007, Index Data ApS
   3  * See the file LICENSE for details.
   4  *
   5  * $Id: seshigh.c,v 1.109 2007-01-16 14:12:38 adam Exp $
   6  */
   7 /**
   8  * \file seshigh.c
   9  * \brief Implements GFS session logic.
  10  *
  11  * Frontend server logic.
  12  *
  13  * This code receives incoming APDUs, and handles client requests by means
  14  * of the backend API.
  15  *
  16  * Some of the code is getting quite involved, compared to simpler servers -
  17  * primarily because it is asynchronous both in the communication with
  18  * the user and the backend. We think the complexity will pay off in
  19  * the form of greater flexibility when more asynchronous facilities
  20  * are implemented.
  21  *
  22  * Memory management has become somewhat involved. In the simple case, where
  23  * only one PDU is pending at a time, it will simply reuse the same memory,
  24  * once it has found its working size. When we enable multiple concurrent
  25  * operations, perhaps even with multiple parallel calls to the backend, it
  26  * will maintain a pool of buffers for encoding and decoding, trying to
  27  * minimize memory allocation/deallocation during normal operation.
  28  *
  29  */
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <assert.h>
  34 #include <ctype.h>
  35
  36 #if HAVE_SYS_TYPES_H
  37 #include <sys/types.h>
  38 #endif
  39 #if HAVE_SYS_STAT_H
  40 #include <sys/stat.h>
  41 #endif
  42
  43 #ifdef WIN32
  44 #include <io.h>
  45 #define S_ISREG(x) (x & _S_IFREG)
  46 #include <process.h>
  47 #endif
  48
  49 #if HAVE_UNISTD_H
  50 #include <unistd.h>
  51 #endif
  52
  53 #if YAZ_HAVE_XML2
  54 #include <libxml/parser.h>
  55 #include <libxml/tree.h>
  56 #endif
  57
  58 #include <yaz/yconfig.h>
  59 #include <yaz/xmalloc.h>
  60 #include <yaz/comstack.h>
  61 #include "eventl.h"
  62 #include "session.h"
  63 #include "mime.h"
  64 #include <yaz/proto.h>
  65 #include <yaz/oid.h>
  66 #include <yaz/log.h>
  67 #include <yaz/logrpn.h>
  68 #include <yaz/querytowrbuf.h>
  69 #include <yaz/statserv.h>
  70 #include <yaz/diagbib1.h>
  71 #include <yaz/charneg.h>
  72 #include <yaz/otherinfo.h>
  73 #include <yaz/yaz-util.h>
  74 #include <yaz/pquery.h>
  75
  76 #include <yaz/srw.h>
  77 #include <yaz/backend.h>
  78
  79 static void process_gdu_request(association *assoc, request *req);
  80 static int process_z_request(association *assoc, request *req, char **msg);
  81 void backend_response(IOCHAN i, int event);
  82 static int process_gdu_response(association *assoc, request *req, Z_GDU *res);
  83 static int process_z_response(association *assoc, request *req, Z_APDU *res);
  84 static Z_APDU *process_initRequest(association *assoc, request *reqb);
  85 static Z_External *init_diagnostics(ODR odr, int errcode,
  86                                     const char *errstring);
  87 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
  88     int *fd);
  89 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
  90     bend_search_rr *bsrr, int *fd);
  91 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
  92     int *fd);
  93 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd);
  94 static Z_APDU *process_sortRequest(association *assoc, request *reqb, int *fd);
  95 static void process_close(association *assoc, request *reqb);
  96 void save_referenceId (request *reqb, Z_ReferenceId *refid);
  97 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
  98     int *fd);
  99 static Z_APDU *process_segmentRequest (association *assoc, request *reqb);
 100
 101 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd);
 102
 103 /* dynamic logging levels */
 104 static int logbits_set = 0;
 105 static int log_session = 0; /* one-line logs for session */
 106 static int log_sessiondetail = 0; /* more detailed stuff */
 107 static int log_request = 0; /* one-line logs for requests */
 108 static int log_requestdetail = 0;  /* more detailed stuff */
 109
 110 /** get_logbits sets global loglevel bits */
 111 static void get_logbits(void)
 112 { /* needs to be called after parsing cmd-line args that can set loglevels!*/
 113     if (!logbits_set)
 114     {
 115         logbits_set = 1;
 116         log_session = yaz_log_module_level("session");
 117         log_sessiondetail = yaz_log_module_level("sessiondetail");
 118         log_request = yaz_log_module_level("request");
 119         log_requestdetail = yaz_log_module_level("requestdetail");
 120     }
 121 }
 122
 123
 124
 125 static void wr_diag(WRBUF w, int error, const char *addinfo)
 126 {
 127     wrbuf_printf(w, "ERROR %d+", error);
 128     wrbuf_puts_replace_char(w, diagbib1_str(error), ' ', '_');
 129     if (addinfo){
 130         wrbuf_puts(w, "+");
 131         wrbuf_puts_replace_char(w, addinfo, ' ', '_');
 132     }
 133
 134     wrbuf_puts(w, " ");
 135 }
 136
 137
 138 /*
 139  * Create and initialize a new association-handle.
 140  *  channel  : iochannel for the current line.
 141  *  link     : communications channel.
 142  * Returns: 0 or a new association handle.
 143  */
 144 association *create_association(IOCHAN channel, COMSTACK link,
 145                                 const char *apdufile)
 146 {
 147     association *anew;
 148
 149     if (!logbits_set)
 150         get_logbits();
 151     if (!(anew = (association *)xmalloc(sizeof(*anew))))
 152         return 0;
 153     anew->init = 0;
 154     anew->version = 0;
 155     anew->last_control = 0;
 156     anew->client_chan = channel;
 157     anew->client_link = link;
 158     anew->cs_get_mask = 0;
 159     anew->cs_put_mask = 0;
 160     anew->cs_accept_mask = 0;
 161     if (!(anew->decode = odr_createmem(ODR_DECODE)) ||
 162         !(anew->encode = odr_createmem(ODR_ENCODE)))
 163         return 0;
 164     if (apdufile && *apdufile)
 165     {
 166         FILE *f;
 167
 168         if (!(anew->print = odr_createmem(ODR_PRINT)))
 169             return 0;
 170         if (*apdufile == '@')
 171         {
 172             odr_setprint(anew->print, yaz_log_file());
 173         }
 174         else if (*apdufile != '-')
 175         {
 176             char filename[256];
 177             sprintf(filename, "%.200s.%ld", apdufile, (long)getpid());
 178             if (!(f = fopen(filename, "w")))
 179             {
 180                 yaz_log(YLOG_WARN|YLOG_ERRNO, "%s", filename);
 181                 return 0;
 182             }
 183             setvbuf(f, 0, _IONBF, 0);
 184             odr_setprint(anew->print, f);
 185         }
 186     }
 187     else
 188         anew->print = 0;
 189     anew->input_buffer = 0;
 190     anew->input_buffer_len = 0;
 191     anew->backend = 0;
 192     anew->state = ASSOC_NEW;
 193     request_initq(&anew->incoming);
 194     request_initq(&anew->outgoing);
 195     anew->proto = cs_getproto(link);
 196     anew->server = 0;
 197     return anew;
 198 }
 199
 200 /*
 201  * Free association and release resources.
 202  */
 203 void destroy_association(association *h)
 204 {
 205     statserv_options_block *cb = statserv_getcontrol();
 206     request *req;
 207
 208     xfree(h->init);
 209     odr_destroy(h->decode);
 210     odr_destroy(h->encode);
 211     if (h->print)
 212         odr_destroy(h->print);
 213     if (h->input_buffer)
 214     xfree(h->input_buffer);
 215     if (h->backend)
 216         (*cb->bend_close)(h->backend);
 217     while ((req = request_deq(&h->incoming)))
 218         request_release(req);
 219     while ((req = request_deq(&h->outgoing)))
 220         request_release(req);
 221     request_delq(&h->incoming);
 222     request_delq(&h->outgoing);
 223     xfree(h);
 224     xmalloc_trav("session closed");
 225     if (cb && cb->one_shot)
 226     {
 227         exit (0);
 228     }
 229 }
 230
 231 static void do_close_req(association *a, int reason, char *message,
 232                          request *req)
 233 {
 234     Z_APDU apdu;
 235     Z_Close *cls = zget_Close(a->encode);
 236
 237     /* Purge request queue */
 238     while (request_deq(&a->incoming));
 239     while (request_deq(&a->outgoing));
 240     if (a->version >= 3)
 241     {
 242         yaz_log(log_requestdetail, "Sending Close PDU, reason=%d, message=%s",
 243             reason, message ? message : "none");
 244         apdu.which = Z_APDU_close;
 245         apdu.u.close = cls;
 246         *cls->closeReason = reason;
 247         cls->diagnosticInformation = message;
 248         process_z_response(a, req, &apdu);
 249         iochan_settimeout(a->client_chan, 20);
 250     }
 251     else
 252     {
 253         request_release(req);
 254         yaz_log(log_requestdetail, "v2 client. No Close PDU");
 255         iochan_setevent(a->client_chan, EVENT_TIMEOUT); /* force imm close */
 256         a->cs_put_mask = 0;
 257     }
 258     a->state = ASSOC_DEAD;
 259 }
 260
 261 static void do_close(association *a, int reason, char *message)
 262 {
 263     request *req = request_get(&a->outgoing);
 264     do_close_req (a, reason, message, req);
 265 }
 266
 267
 268 int ir_read(IOCHAN h, int event)
 269 {
 270     association *assoc = (association *)iochan_getdata(h);
 271     COMSTACK conn = assoc->client_link;
 272     request *req;
 273
 274     if ((assoc->cs_put_mask & EVENT_INPUT) == 0 && (event & assoc->cs_get_mask))
 275     {
 276         yaz_log(YLOG_DEBUG, "ir_session (input)");
 277         /* We aren't speaking to this fellow */
 278         if (assoc->state == ASSOC_DEAD)
 279         {
 280             yaz_log(log_sessiondetail, "Connection closed - end of session");
 281             cs_close(conn);
 282             destroy_association(assoc);
 283             iochan_destroy(h);
 284             return 0;
 285         }
 286         assoc->cs_get_mask = EVENT_INPUT;
 287
 288         do
 289         {
 290             int res = cs_get(conn, &assoc->input_buffer,
 291                              &assoc->input_buffer_len);
 292             if (res < 0 && cs_errno(conn) == CSBUFSIZE)
 293             {
 294                 yaz_log(log_session, "Connection error: %s res=%d",
 295                         cs_errmsg(cs_errno(conn)), res);
 296                 req = request_get(&assoc->incoming); /* get a new request */
 297                 do_close_req(assoc, Z_Close_protocolError,
 298                              "Incoming package too large", req);
 299                 return 0;
 300             }
 301             else if (res <= 0)
 302             {
 303                 yaz_log(log_session, "Connection closed by client");
 304                 assoc->state = ASSOC_DEAD;
 305                 return 0;
 306             }
 307             else if (res == 1) /* incomplete read - wait for more  */
 308             {
 309                 if (conn->io_pending & CS_WANT_WRITE)
 310                     assoc->cs_get_mask |= EVENT_OUTPUT;
 311                 iochan_setflag(h, assoc->cs_get_mask);
 312                 return 0;
 313             }
 314             /* we got a complete PDU. Let's decode it */
 315             yaz_log(YLOG_DEBUG, "Got PDU, %d bytes: lead=%02X %02X %02X", res,
 316                     assoc->input_buffer[0] & 0xff,
 317                     assoc->input_buffer[1] & 0xff,
 318                     assoc->input_buffer[2] & 0xff);
 319             req = request_get(&assoc->incoming); /* get a new request */
 320             odr_reset(assoc->decode);
 321             odr_setbuf(assoc->decode, assoc->input_buffer, res, 0);
 322             if (!z_GDU(assoc->decode, &req->gdu_request, 0, 0))
 323             {
 324                 yaz_log(YLOG_WARN, "ODR error on incoming PDU: %s [element %s] "
 325                         "[near byte %ld] ",
 326                         odr_errmsg(odr_geterror(assoc->decode)),
 327                         odr_getelement(assoc->decode),
 328                         (long) odr_offset(assoc->decode));
 329                 if (assoc->decode->error != OHTTP)
 330                 {
 331                     yaz_log(YLOG_WARN, "PDU dump:");
 332                     odr_dumpBER(yaz_log_file(), assoc->input_buffer, res);
 333                     request_release(req);
 334                     do_close(assoc, Z_Close_protocolError, "Malformed package");
 335                 }
 336                 else
 337                 {
 338                     Z_GDU *p = z_get_HTTP_Response(assoc->encode, 400);
 339                     assoc->state = ASSOC_DEAD;
 340                     process_gdu_response(assoc, req, p);
 341                 }
 342                 return 0;
 343             }
 344             req->request_mem = odr_extract_mem(assoc->decode);
 345             if (assoc->print)
 346             {
 347                 if (!z_GDU(assoc->print, &req->gdu_request, 0, 0))
 348                     yaz_log(YLOG_WARN, "ODR print error: %s",
 349                             odr_errmsg(odr_geterror(assoc->print)));
 350                 odr_reset(assoc->print);
 351             }
 352             request_enq(&assoc->incoming, req);
 353         }
 354         while (cs_more(conn));
 355     }
 356     return 1;
 357 }
 358
 359 /*
 360  * This is where PDUs from the client are read and the further
 361  * processing is initiated. Flow of control moves down through the
 362  * various process_* functions below, until the encoded result comes back up
 363  * to the output handler in here.
 364  *
 365  *  h     : the I/O channel that has an outstanding event.
 366  *  event : the current outstanding event.
 367  */
 368 void ir_session(IOCHAN h, int event)
 369 {
 370     int res;
 371     association *assoc = (association *)iochan_getdata(h);
 372     COMSTACK conn = assoc->client_link;
 373     request *req;
 374
 375     assert(h && conn && assoc);
 376     if (event == EVENT_TIMEOUT)
 377     {
 378         if (assoc->state != ASSOC_UP)
 379         {
 380             yaz_log(YLOG_DEBUG, "Final timeout - closing connection.");
 381             /* do we need to lod this at all */
 382             cs_close(conn);
 383             destroy_association(assoc);
 384             iochan_destroy(h);
 385         }
 386         else
 387         {
 388             yaz_log(log_sessiondetail,
 389                     "Session idle too long. Sending close.");
 390             do_close(assoc, Z_Close_lackOfActivity, 0);
 391         }
 392         return;
 393     }
 394     if (event & assoc->cs_accept_mask)
 395     {
 396         if (!cs_accept (conn))
 397         {
 398             yaz_log (YLOG_WARN, "accept failed");
 399             destroy_association(assoc);
 400             iochan_destroy(h);
 401         }
 402         iochan_clearflag (h, EVENT_OUTPUT);
 403         if (conn->io_pending)
 404         {   /* cs_accept didn't complete */
 405             assoc->cs_accept_mask =
 406                 ((conn->io_pending & CS_WANT_WRITE) ? EVENT_OUTPUT : 0) |
 407                 ((conn->io_pending & CS_WANT_READ) ? EVENT_INPUT : 0);
 408
 409             iochan_setflag (h, assoc->cs_accept_mask);
 410         }
 411         else
 412         {   /* cs_accept completed. Prepare for reading (cs_get) */
 413             assoc->cs_accept_mask = 0;
 414             assoc->cs_get_mask = EVENT_INPUT;
 415             iochan_setflag (h, assoc->cs_get_mask);
 416         }
 417         return;
 418     }
 419     if (event & assoc->cs_get_mask) /* input */
 420     {
 421         if (!ir_read(h, event))
 422             return;
 423         req = request_head(&assoc->incoming);
 424         if (req->state == REQUEST_IDLE)
 425         {
 426             request_deq(&assoc->incoming);
 427             process_gdu_request(assoc, req);
 428         }
 429     }
 430     if (event & assoc->cs_put_mask)
 431     {
 432         request *req = request_head(&assoc->outgoing);
 433
 434         assoc->cs_put_mask = 0;
 435         yaz_log(YLOG_DEBUG, "ir_session (output)");
 436         req->state = REQUEST_PENDING;
 437         switch (res = cs_put(conn, req->response, req->len_response))
 438         {
 439         case -1:
 440             yaz_log(log_sessiondetail, "Connection closed by client");
 441             cs_close(conn);
 442             destroy_association(assoc);
 443             iochan_destroy(h);
 444             break;
 445         case 0: /* all sent - release the request structure */
 446             yaz_log(YLOG_DEBUG, "Wrote PDU, %d bytes", req->len_response);
 447 #if 0
 448             yaz_log(YLOG_DEBUG, "HTTP out:\n%.*s", req->len_response,
 449                     req->response);
 450 #endif
 451             nmem_destroy(req->request_mem);
 452             request_deq(&assoc->outgoing);
 453             request_release(req);
 454             if (!request_head(&assoc->outgoing))
 455             {   /* restore mask for cs_get operation ... */
 456                 iochan_clearflag(h, EVENT_OUTPUT|EVENT_INPUT);
 457                 iochan_setflag(h, assoc->cs_get_mask);
 458                 if (assoc->state == ASSOC_DEAD)
 459                     iochan_setevent(assoc->client_chan, EVENT_TIMEOUT);
 460             }
 461             else
 462             {
 463                 assoc->cs_put_mask = EVENT_OUTPUT;
 464             }
 465             break;
 466         default:
 467             if (conn->io_pending & CS_WANT_WRITE)
 468                 assoc->cs_put_mask |= EVENT_OUTPUT;
 469             if (conn->io_pending & CS_WANT_READ)
 470                 assoc->cs_put_mask |= EVENT_INPUT;
 471             iochan_setflag(h, assoc->cs_put_mask);
 472         }
 473     }
 474     if (event & EVENT_EXCEPT)
 475     {
 476         yaz_log(YLOG_WARN, "ir_session (exception)");
 477         cs_close(conn);
 478         destroy_association(assoc);
 479         iochan_destroy(h);
 480     }
 481 }
 482
 483 static int process_z_request(association *assoc, request *req, char **msg);
 484
 485
 486 static void assoc_init_reset(association *assoc)
 487 {
 488     xfree (assoc->init);
 489     assoc->init = (bend_initrequest *) xmalloc (sizeof(*assoc->init));
 490
 491     assoc->init->stream = assoc->encode;
 492     assoc->init->print = assoc->print;
 493     assoc->init->auth = 0;
 494     assoc->init->referenceId = 0;
 495     assoc->init->implementation_version = 0;
 496     assoc->init->implementation_id = 0;
 497     assoc->init->implementation_name = 0;
 498     assoc->init->bend_sort = NULL;
 499     assoc->init->bend_search = NULL;
 500     assoc->init->bend_present = NULL;
 501     assoc->init->bend_esrequest = NULL;
 502     assoc->init->bend_delete = NULL;
 503     assoc->init->bend_scan = NULL;
 504     assoc->init->bend_segment = NULL;
 505     assoc->init->bend_fetch = NULL;
 506     assoc->init->bend_explain = NULL;
 507     assoc->init->bend_srw_scan = NULL;
 508     assoc->init->bend_srw_update = NULL;
 509
 510     assoc->init->charneg_request = NULL;
 511     assoc->init->charneg_response = NULL;
 512
 513     assoc->init->decode = assoc->decode;
 514     assoc->init->peer_name =
 515         odr_strdup (assoc->encode, cs_addrstr(assoc->client_link));
 516
 517     yaz_log(log_requestdetail, "peer %s", assoc->init->peer_name);
 518 }
 519
 520 static int srw_bend_init(association *assoc, Z_SRW_diagnostic **d, int *num, Z_SRW_PDU *sr)
 521 {
 522     statserv_options_block *cb = statserv_getcontrol();
 523     if (!assoc->init)
 524     {
 525         const char *encoding = "UTF-8";
 526         Z_External *ce;
 527         bend_initresult *binitres;
 528
 529         yaz_log(log_requestdetail, "srw_bend_init config=%s", cb->configname);
 530         assoc_init_reset(assoc);
 531
 532         if (sr->username)
 533         {
 534             Z_IdAuthentication *auth = odr_malloc(assoc->decode, sizeof(*auth));
 535             int len;
 536
 537             len = strlen(sr->username) + 1;
 538             if (sr->password)
 539                 len += strlen(sr->password) + 2;
 540             auth->which = Z_IdAuthentication_open;
 541             auth->u.open = odr_malloc(assoc->decode, len);
 542             strcpy(auth->u.open, sr->username);
 543             if (sr->password && *sr->password)
 544             {
 545                 strcat(auth->u.open, "/");
 546                 strcat(auth->u.open, sr->password);
 547             }
 548             assoc->init->auth = auth;
 549         }
 550
 551 #if 1
 552         ce = yaz_set_proposal_charneg(assoc->decode, &encoding, 1, 0, 0, 1);
 553         assoc->init->charneg_request = ce->u.charNeg3;
 554 #endif
 555         assoc->backend = 0;
 556         if (!(binitres = (*cb->bend_init)(assoc->init)))
 557         {
 558             assoc->state = ASSOC_DEAD;
 559             yaz_add_srw_diagnostic(assoc->encode, d, num,
 560                             YAZ_SRW_AUTHENTICATION_ERROR, 0);
 561             return 0;
 562         }
 563         assoc->backend = binitres->handle;
 564         assoc->init->auth = 0;
 565         if (binitres->errcode)
 566         {
 567             int srw_code = yaz_diag_bib1_to_srw(binitres->errcode);
 568             assoc->state = ASSOC_DEAD;
 569             yaz_add_srw_diagnostic(assoc->encode, d, num, srw_code,
 570                                    binitres->errstring);
 571             return 0;
 572         }
 573         return 1;
 574     }
 575     return 1;
 576 }
 577
 578 static int retrieve_fetch(association *assoc, bend_fetch_rr *rr)
 579 {
 580 #if YAZ_HAVE_XML2
 581     yaz_record_conv_t rc = 0;
 582     const char *match_schema = 0;
 583     int *match_syntax = 0;
 584
 585     if (assoc->server)
 586     {
 587         int r;
 588         const char *input_schema = yaz_get_esn(rr->comp);
 589         Odr_oid *input_syntax_raw = rr->request_format_raw;
 590
 591         const char *backend_schema = 0;
 592         Odr_oid *backend_syntax = 0;
 593
 594         r = yaz_retrieval_request(assoc->server->retrieval,
 595                                   input_schema,
 596                                   input_syntax_raw,
 597                                   &match_schema,
 598                                   &match_syntax,
 599                                   &rc,
 600                                   &backend_schema,
 601                                   &backend_syntax);
 602         if (r == -1) /* error ? */
 603         {
 604             const char *details = yaz_retrieval_get_error(
 605                 assoc->server->retrieval);
 606
 607             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 608             if (details)
 609                 rr->errstring = odr_strdup(rr->stream, details);
 610             return -1;
 611         }
 612         else if (r == 1 || r == 3)
 613         {
 614             const char *details = input_schema;
 615             rr->errcode =  YAZ_BIB1_ELEMENT_SET_NAMES_UNSUPP;
 616             if (details)
 617                 rr->errstring = odr_strdup(rr->stream, details);
 618             return -1;
 619         }
 620         else if (r == 2)
 621         {
 622             rr->errcode = YAZ_BIB1_RECORD_SYNTAX_UNSUPP;
 623             if (input_syntax_raw)
 624             {
 625                 char oidbuf[OID_STR_MAX];
 626                 oid_to_dotstring(input_syntax_raw, oidbuf);
 627                 rr->errstring = odr_strdup(rr->stream, oidbuf);
 628             }
 629             return -1;
 630         }
 631         if (backend_schema)
 632         {
 633             yaz_set_esn(&rr->comp, backend_schema, rr->stream->mem);
 634         }
 635         if (backend_syntax)
 636         {
 637             oident *oident_syntax = oid_getentbyoid(backend_syntax);
 638
 639             rr->request_format_raw = backend_syntax;
 640
 641             if (oident_syntax)
 642                 rr->request_format = oident_syntax->value;
 643             else
 644                 rr->request_format = VAL_NONE;
 645         }
 646     }
 647     (*assoc->init->bend_fetch)(assoc->backend, rr);
 648     if (rc && rr->record && rr->errcode == 0 && rr->len > 0)
 649     {   /* post conversion must take place .. */
 650         WRBUF output_record = wrbuf_alloc();
 651         int r = yaz_record_conv_record(rc, rr->record, rr->len, output_record);
 652         if (r)
 653         {
 654             const char *details = yaz_record_conv_get_error(rc);
 655             rr->errcode = YAZ_BIB1_SYSTEM_ERROR_IN_PRESENTING_RECORDS;
 656             if (details)
 657                 rr->errstring = odr_strdup(rr->stream, details);
 658         }
 659         else
 660         {
 661             rr->len = wrbuf_len(output_record);
 662             rr->record = odr_malloc(rr->stream, rr->len);
 663             memcpy(rr->record, wrbuf_buf(output_record), rr->len);
 664         }
 665         wrbuf_free(output_record, 1);
 666     }
 667     if (match_syntax)
 668     {
 669         struct oident *oi = oid_getentbyoid(match_syntax);
 670         rr->output_format = oi ? oi->value : VAL_NONE;
 671         rr->output_format_raw = match_syntax;
 672     }
 673     if (match_schema)
 674         rr->schema = odr_strdup(rr->stream, match_schema);
 675     return 0;
 676 #else
 677     (*assoc->init->bend_fetch)(assoc->backend, rr);
 678 #endif
 679 }
 680
 681 static int srw_bend_fetch(association *assoc, int pos,
 682                           Z_SRW_searchRetrieveRequest *srw_req,
 683                           Z_SRW_record *record,
 684                           const char **addinfo)
 685 {
 686     bend_fetch_rr rr;
 687     ODR o = assoc->encode;
 688
 689     rr.setname = "default";
 690     rr.number = pos;
 691     rr.referenceId = 0;
 692     rr.request_format = VAL_TEXT_XML;
 693     rr.request_format_raw = yaz_oidval_to_z3950oid(assoc->decode,
 694                                                    CLASS_RECSYN,
 695                                                    VAL_TEXT_XML);
 696     rr.comp = (Z_RecordComposition *)
 697             odr_malloc(assoc->decode, sizeof(*rr.comp));
 698     rr.comp->which = Z_RecordComp_complex;
 699     rr.comp->u.complex = (Z_CompSpec *)
 700             odr_malloc(assoc->decode, sizeof(Z_CompSpec));
 701     rr.comp->u.complex->selectAlternativeSyntax = (bool_t *)
 702         odr_malloc(assoc->encode, sizeof(bool_t));
 703     *rr.comp->u.complex->selectAlternativeSyntax = 0;
 704     rr.comp->u.complex->num_dbSpecific = 0;
 705     rr.comp->u.complex->dbSpecific = 0;
 706     rr.comp->u.complex->num_recordSyntax = 0;
 707     rr.comp->u.complex->recordSyntax = 0;
 708
 709     rr.comp->u.complex->generic = (Z_Specification *)
 710             odr_malloc(assoc->decode, sizeof(Z_Specification));
 711
 712     /* schema uri = recordSchema (or NULL if recordSchema is not given) */
 713     rr.comp->u.complex->generic->which = Z_Schema_uri;
 714     rr.comp->u.complex->generic->schema.uri = srw_req->recordSchema;
 715
 716     /* ESN = recordSchema if recordSchema is present */
 717     rr.comp->u.complex->generic->elementSpec = 0;
 718     if (srw_req->recordSchema)
 719     {
 720         rr.comp->u.complex->generic->elementSpec =
 721             (Z_ElementSpec *) odr_malloc(assoc->encode, sizeof(Z_ElementSpec));
 722         rr.comp->u.complex->generic->elementSpec->which =
 723             Z_ElementSpec_elementSetName;
 724         rr.comp->u.complex->generic->elementSpec->u.elementSetName =
 725             srw_req->recordSchema;
 726     }
 727
 728     rr.stream = assoc->encode;
 729     rr.print = assoc->print;
 730
 731     rr.basename = 0;
 732     rr.len = 0;
 733     rr.record = 0;
 734     rr.last_in_set = 0;
 735     rr.errcode = 0;
 736     rr.errstring = 0;
 737     rr.surrogate_flag = 0;
 738     rr.schema = srw_req->recordSchema;
 739
 740     if (!assoc->init->bend_fetch)
 741         return 1;
 742
 743     retrieve_fetch(assoc, &rr);
 744
 745     if (rr.errcode && rr.surrogate_flag)
 746     {
 747         int code = yaz_diag_bib1_to_srw(rr.errcode);
 748         const char *message = yaz_diag_srw_str(code);
 749         int len = 200;
 750         if (message)
 751             len += strlen(message);
 752         if (rr.errstring)
 753             len += strlen(rr.errstring);
 754
 755         record->recordData_buf = odr_malloc(o, len);
 756
 757         sprintf(record->recordData_buf, "<diagnostic "
 758                 "xmlns=\"http://www.loc.gov/zing/srw/diagnostic/\">\n"
 759                 " <uri>info:srw/diagnostic/1/%d</uri>\n", code);
 760         if (rr.errstring)
 761             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 762                     " <details>%s</details>\n", rr.errstring);
 763         if (message)
 764             sprintf(record->recordData_buf + strlen(record->recordData_buf),
 765                     " <message>%s</message>\n", message);
 766         sprintf(record->recordData_buf + strlen(record->recordData_buf),
 767                 "</diagnostic>\n");
 768         record->recordData_len = strlen(record->recordData_buf);
 769         record->recordPosition = odr_intdup(o, pos);
 770         record->recordSchema = "info:srw/schema/1/diagnostics-v1.1";
 771         return 0;
 772     }
 773     else if (rr.len >= 0)
 774     {
 775         record->recordData_buf = rr.record;
 776         record->recordData_len = rr.len;
 777         record->recordPosition = odr_intdup(o, pos);
 778         if (rr.schema)
 779             record->recordSchema = odr_strdup(o, rr.schema);
 780         else
 781             record->recordSchema = 0;
 782     }
 783     if (rr.errcode)
 784     {
 785         *addinfo = rr.errstring;
 786         return rr.errcode;
 787     }
 788     return 0;
 789 }
 790
 791 static int cql2pqf(ODR odr, const char *cql, cql_transform_t ct,
 792                    Z_Query *query_result)
 793 {
 794     /* have a CQL query and  CQL to PQF transform .. */
 795     CQL_parser cp = cql_parser_create();
 796     int r;
 797     int srw_errcode = 0;
 798     const char *add = 0;
 799     char rpn_buf[5120];
 800
 801     r = cql_parser_string(cp, cql);
 802     if (r)
 803     {
 804         /* CQL syntax error */
 805         srw_errcode = 10;
 806     }
 807     if (!r)
 808     {
 809         /* Syntax OK */
 810         r = cql_transform_buf(ct,
 811                               cql_parser_result(cp),
 812                               rpn_buf, sizeof(rpn_buf)-1);
 813         if (r)
 814             srw_errcode  = cql_transform_error(ct, &add);
 815     }
 816     if (!r)
 817     {
 818         /* Syntax & transform OK. */
 819         /* Convert PQF string to Z39.50 to RPN query struct */
 820         YAZ_PQF_Parser pp = yaz_pqf_create();
 821         Z_RPNQuery *rpnquery = yaz_pqf_parse(pp, odr, rpn_buf);
 822         if (!rpnquery)
 823         {
 824             size_t off;
 825             const char *pqf_msg;
 826             int code = yaz_pqf_error(pp, &pqf_msg, &off);
 827             yaz_log(YLOG_WARN, "PQF Parser Error %s (code %d)",
 828                     pqf_msg, code);
 829             srw_errcode = 10;
 830         }
 831         else
 832         {
 833             query_result->which = Z_Query_type_1;
 834             query_result->u.type_1 = rpnquery;
 835         }
 836         yaz_pqf_destroy(pp);
 837     }
 838     cql_parser_destroy(cp);
 839     return srw_errcode;
 840 }
 841
 842 static int cql2pqf_scan(ODR odr, const char *cql, cql_transform_t ct,
 843                         Z_AttributesPlusTerm *result)
 844 {
 845     Z_Query query;
 846     Z_RPNQuery *rpn;
 847     int srw_error = cql2pqf(odr, cql, ct, &query);
 848     if (srw_error)
 849         return srw_error;
 850     if (query.which != Z_Query_type_1 && query.which != Z_Query_type_101)
 851         return 10; /* bad query type */
 852     rpn = query.u.type_1;
 853     if (!rpn->RPNStructure)
 854         return 10; /* must be structure */
 855     if (rpn->RPNStructure->which != Z_RPNStructure_simple)
 856         return 10; /* must be simple */
 857     if (rpn->RPNStructure->u.simple->which != Z_Operand_APT)
 858         return 10; /* must be attributes plus term node .. */
 859     memcpy(result, rpn->RPNStructure->u.simple->u.attributesPlusTerm,
 860            sizeof(*result));
 861     return 0;
 862 }
 863
 864 static void srw_bend_search(association *assoc, request *req,
 865                             Z_SRW_PDU *sr,
 866                             Z_SRW_searchRetrieveResponse *srw_res,
 867                             int *http_code)
 868 {
 869     int srw_error = 0;
 870     Z_External *ext;
 871     Z_SRW_searchRetrieveRequest *srw_req = sr->u.request;
 872
 873     *http_code = 200;
 874     yaz_log(log_requestdetail, "Got SRW SearchRetrieveRequest");
 875     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
 876     if (srw_res->num_diagnostics == 0 && assoc->init)
 877     {
 878         bend_search_rr rr;
 879         rr.setname = "default";
 880         rr.replace_set = 1;
 881         rr.num_bases = 1;
 882         rr.basenames = &srw_req->database;
 883         rr.referenceId = 0;
 884         rr.srw_sortKeys = 0;
 885         rr.srw_setname = 0;
 886         rr.srw_setnameIdleTime = 0;
 887         rr.estimated_hit_count = 0;
 888         rr.partial_resultset = 0;
 889         rr.query = (Z_Query *) odr_malloc (assoc->decode, sizeof(*rr.query));
 890         rr.query->u.type_1 = 0;
 891
 892         if (srw_req->query_type == Z_SRW_query_type_cql)
 893         {
 894             if (assoc->server && assoc->server->cql_transform)
 895             {
 896                 int srw_errcode = cql2pqf(assoc->encode, srw_req->query.cql,
 897                                           assoc->server->cql_transform,
 898                                           rr.query);
 899                 if (srw_errcode)
 900                 {
 901                     yaz_add_srw_diagnostic(assoc->encode,
 902                                            &srw_res->diagnostics,
 903                                            &srw_res->num_diagnostics,
 904                                            srw_errcode, 0);
 905                 }
 906             }
 907             else
 908             {
 909                 /* CQL query to backend. Wrap it - Z39.50 style */
 910                 ext = (Z_External *) odr_malloc(assoc->decode, sizeof(*ext));
 911                 ext->direct_reference = odr_getoidbystr(assoc->decode,
 912                                                         "1.2.840.10003.16.2");
 913                 ext->indirect_reference = 0;
 914                 ext->descriptor = 0;
 915                 ext->which = Z_External_CQL;
 916                 ext->u.cql = srw_req->query.cql;
 917
 918                 rr.query->which = Z_Query_type_104;
 919                 rr.query->u.type_104 =  ext;
 920             }
 921         }
 922         else if (srw_req->query_type == Z_SRW_query_type_pqf)
 923         {
 924             Z_RPNQuery *RPNquery;
 925             YAZ_PQF_Parser pqf_parser;
 926
 927             pqf_parser = yaz_pqf_create ();
 928
 929             RPNquery = yaz_pqf_parse (pqf_parser, assoc->decode,
 930                                       srw_req->query.pqf);
 931             if (!RPNquery)
 932             {
 933                 const char *pqf_msg;
 934                 size_t off;
 935                 int code = yaz_pqf_error (pqf_parser, &pqf_msg, &off);
 936                 yaz_log(log_requestdetail, "Parse error %d %s near offset %ld",
 937                         code, pqf_msg, (long) off);
 938                 srw_error = YAZ_SRW_QUERY_SYNTAX_ERROR;
 939             }
 940
 941             rr.query->which = Z_Query_type_1;
 942             rr.query->u.type_1 =  RPNquery;
 943
 944             yaz_pqf_destroy (pqf_parser);
 945         }
 946         else
 947         {
 948             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
 949                                    &srw_res->num_diagnostics,
 950                                    YAZ_SRW_UNSUPP_QUERY_TYPE, 0);
 951         }
 952         if (rr.query->u.type_1)
 953         {
 954             rr.stream = assoc->encode;
 955             rr.decode = assoc->decode;
 956             rr.print = assoc->print;
 957             rr.request = req;
 958             if ( srw_req->sort.sortKeys )
 959                 rr.srw_sortKeys = odr_strdup(assoc->encode,
 960                                              srw_req->sort.sortKeys );
 961             rr.association = assoc;
 962             rr.fd = 0;
 963             rr.hits = 0;
 964             rr.errcode = 0;
 965             rr.errstring = 0;
 966             rr.search_info = 0;
 967             yaz_log_zquery_level(log_requestdetail,rr.query);
 968
 969             (assoc->init->bend_search)(assoc->backend, &rr);
 970             if (rr.errcode)
 971             {
 972                 if (rr.errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
 973                 {
 974                     *http_code = 404;
 975                 }
 976                 else
 977                 {
 978                     srw_error = yaz_diag_bib1_to_srw (rr.errcode);
 979                     yaz_add_srw_diagnostic(assoc->encode,
 980                                            &srw_res->diagnostics,
 981                                            &srw_res->num_diagnostics,
 982                                            srw_error, rr.errstring);
 983                 }
 984             }
 985             else
 986             {
 987                 int number = srw_req->maximumRecords ? *srw_req->maximumRecords : 0;
 988                 int start = srw_req->startRecord ? *srw_req->startRecord : 1;
 989
 990                 yaz_log(log_requestdetail, "Request to pack %d+%d out of %d",
 991                         start, number, rr.hits);
 992
 993                 srw_res->numberOfRecords = odr_intdup(assoc->encode, rr.hits);
 994                 if (rr.srw_setname)
 995                 {
 996                     srw_res->resultSetId =
 997                         odr_strdup(assoc->encode, rr.srw_setname );
 998                     srw_res->resultSetIdleTime =
 999                         odr_intdup(assoc->encode, *rr.srw_setnameIdleTime );
1000                 }
1001
1002                 if ((rr.hits > 0 && start > rr.hits) || start < 1)
1003                 {
1004                     yaz_add_srw_diagnostic(
1005                         assoc->encode,
1006                         &srw_res->diagnostics, &srw_res->num_diagnostics,
1007                         YAZ_SRW_FIRST_RECORD_POSITION_OUT_OF_RANGE, 0);
1008                 }
1009                 else if (number > 0)
1010                 {
1011                     int i;
1012                     int ok = 1;
1013                     if (start + number > rr.hits)
1014                         number = rr.hits - start + 1;
1015
1016                     /* Call bend_present if defined */
1017                     if (assoc->init->bend_present)
1018                     {
1019                         bend_present_rr *bprr = (bend_present_rr*)
1020                             odr_malloc (assoc->decode, sizeof(*bprr));
1021                         bprr->setname = "default";
1022                         bprr->start = start;
1023                         bprr->number = number;
1024                         bprr->format = VAL_TEXT_XML;
1025                         if (srw_req->recordSchema)
1026                         {
1027                             bprr->comp = (Z_RecordComposition *) odr_malloc(assoc->decode,
1028                                                                             sizeof(*bprr->comp));
1029                             bprr->comp->which = Z_RecordComp_simple;
1030                             bprr->comp->u.simple = (Z_ElementSetNames *)
1031                                 odr_malloc(assoc->decode, sizeof(Z_ElementSetNames));
1032                             bprr->comp->u.simple->which = Z_ElementSetNames_generic;
1033                             bprr->comp->u.simple->u.generic = srw_req->recordSchema;
1034                         }
1035                         else
1036                         {
1037                             bprr->comp = 0;
1038                         }
1039                         bprr->stream = assoc->encode;
1040                         bprr->referenceId = 0;
1041                         bprr->print = assoc->print;
1042                         bprr->request = req;
1043                         bprr->association = assoc;
1044                         bprr->errcode = 0;
1045                         bprr->errstring = NULL;
1046                         (*assoc->init->bend_present)(assoc->backend, bprr);
1047
1048                         if (!bprr->request)
1049                             return;
1050                         if (bprr->errcode)
1051                         {
1052                             srw_error = yaz_diag_bib1_to_srw (bprr->errcode);
1053                             yaz_add_srw_diagnostic(assoc->encode,
1054                                                    &srw_res->diagnostics,
1055                                                    &srw_res->num_diagnostics,
1056                                                    srw_error, bprr->errstring);
1057                             ok = 0;
1058                         }
1059                     }
1060
1061                     if (ok)
1062                     {
1063                         int j = 0;
1064                         int packing = Z_SRW_recordPacking_string;
1065                         if (srw_req->recordPacking)
1066                         {
1067                             packing =
1068                                 yaz_srw_str_to_pack(srw_req->recordPacking);
1069                             if (packing == -1)
1070                                 packing = Z_SRW_recordPacking_string;
1071                         }
1072                         srw_res->records = (Z_SRW_record *)
1073                             odr_malloc(assoc->encode,
1074                                        number * sizeof(*srw_res->records));
1075
1076                         srw_res->extra_records = (Z_SRW_extra_record **)
1077                             odr_malloc(assoc->encode,
1078                                        number*sizeof(*srw_res->extra_records));
1079
1080                         for (i = 0; i<number; i++)
1081                         {
1082                             int errcode;
1083                             const char *addinfo = 0;
1084
1085                             srw_res->records[j].recordPacking = packing;
1086                             srw_res->records[j].recordData_buf = 0;
1087                             srw_res->extra_records[j] = 0;
1088                             yaz_log(YLOG_DEBUG, "srw_bend_fetch %d", i+start);
1089                             errcode = srw_bend_fetch(assoc, i+start, srw_req,
1090                                                      srw_res->records + j,
1091                                                      &addinfo);
1092                             if (errcode)
1093                             {
1094                                 yaz_add_srw_diagnostic(assoc->encode,
1095                                                        &srw_res->diagnostics,
1096                                                        &srw_res->num_diagnostics,
1097                                                        yaz_diag_bib1_to_srw (errcode),
1098                                                        addinfo);
1099
1100                                 break;
1101                             }
1102                             if (srw_res->records[j].recordData_buf)
1103                                 j++;
1104                         }
1105                         srw_res->num_records = j;
1106                         if (!j)
1107                             srw_res->records = 0;
1108                     }
1109                 }
1110                 if (rr.estimated_hit_count || rr.partial_resultset)
1111                 {
1112                     yaz_add_srw_diagnostic(
1113                         assoc->encode,
1114                         &srw_res->diagnostics,
1115                         &srw_res->num_diagnostics,
1116                         YAZ_SRW_RESULT_SET_CREATED_WITH_VALID_PARTIAL_RESULTS_AVAILABLE,
1117                         0);
1118                 }
1119             }
1120         }
1121     }
1122     if (log_request)
1123     {
1124         const char *querystr = "?";
1125         const char *querytype = "?";
1126         WRBUF wr = wrbuf_alloc();
1127
1128         switch (srw_req->query_type)
1129         {
1130         case Z_SRW_query_type_cql:
1131             querytype = "CQL";
1132             querystr = srw_req->query.cql;
1133             break;
1134         case Z_SRW_query_type_pqf:
1135             querytype = "PQF";
1136             querystr = srw_req->query.pqf;
1137             break;
1138         }
1139         wrbuf_printf(wr, "SRWSearch ");
1140         wrbuf_printf(wr, srw_req->database);
1141         wrbuf_printf(wr, " ");
1142         if (srw_res->num_diagnostics)
1143             wrbuf_printf(wr, "ERROR %s", srw_res->diagnostics[0].uri);
1144         else if (*http_code != 200)
1145             wrbuf_printf(wr, "ERROR info:http/%d", *http_code);
1146         else if (srw_res->numberOfRecords)
1147         {
1148             wrbuf_printf(wr, "OK %d",
1149                          (srw_res->numberOfRecords ?
1150                           *srw_res->numberOfRecords : 0));
1151         }
1152         wrbuf_printf(wr, " %s %d+%d",
1153                      (srw_res->resultSetId ?
1154                       srw_res->resultSetId : "-"),
1155                      (srw_req->startRecord ? *srw_req->startRecord : 1),
1156                      srw_res->num_records);
1157         yaz_log(log_request, "%s %s: %s", wrbuf_buf(wr), querytype, querystr);
1158         wrbuf_free(wr, 1);
1159     }
1160 }
1161
1162 static char *srw_bend_explain_default(void *handle, bend_explain_rr *rr)
1163 {
1164 #if YAZ_HAVE_XML2
1165     xmlNodePtr ptr = rr->server_node_ptr;
1166     if (!ptr)
1167         return 0;
1168     for (ptr = ptr->children; ptr; ptr = ptr->next)
1169     {
1170         if (ptr->type != XML_ELEMENT_NODE)
1171             continue;
1172         if (!strcmp((const char *) ptr->name, "explain"))
1173         {
1174             int len;
1175             xmlDocPtr doc = xmlNewDoc(BAD_CAST "1.0");
1176             xmlChar *buf_out;
1177             char *content;
1178
1179             ptr = xmlCopyNode(ptr, 1);
1180
1181             xmlDocSetRootElement(doc, ptr);
1182
1183             xmlDocDumpMemory(doc, &buf_out, &len);
1184             content = (char*) odr_malloc(rr->stream, 1+len);
1185             memcpy(content, buf_out, len);
1186             content[len] = '\0';
1187
1188             xmlFree(buf_out);
1189             xmlFreeDoc(doc);
1190             rr->explain_buf = content;
1191             return 0;
1192         }
1193     }
1194 #endif
1195     return 0;
1196 }
1197
1198 static void srw_bend_explain(association *assoc, request *req,
1199                              Z_SRW_PDU *sr,
1200                              Z_SRW_explainResponse *srw_res,
1201                              int *http_code)
1202 {
1203     Z_SRW_explainRequest *srw_req = sr->u.explain_request;
1204     yaz_log(log_requestdetail, "Got SRW ExplainRequest");
1205     *http_code = 404;
1206     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1207     if (assoc->init)
1208     {
1209         bend_explain_rr rr;
1210
1211         rr.stream = assoc->encode;
1212         rr.decode = assoc->decode;
1213         rr.print = assoc->print;
1214         rr.explain_buf = 0;
1215         rr.database = srw_req->database;
1216         if (assoc->server)
1217             rr.server_node_ptr = assoc->server->server_node_ptr;
1218         else
1219             rr.server_node_ptr = 0;
1220         rr.schema = "http://explain.z3950.org/dtd/2.0/";
1221         if (assoc->init->bend_explain)
1222             (*assoc->init->bend_explain)(assoc->backend, &rr);
1223         else
1224             srw_bend_explain_default(assoc->backend, &rr);
1225
1226         if (rr.explain_buf)
1227         {
1228             int packing = Z_SRW_recordPacking_string;
1229             if (srw_req->recordPacking)
1230             {
1231                 packing =
1232                     yaz_srw_str_to_pack(srw_req->recordPacking);
1233                 if (packing == -1)
1234                     packing = Z_SRW_recordPacking_string;
1235             }
1236             srw_res->record.recordSchema = rr.schema;
1237             srw_res->record.recordPacking = packing;
1238             srw_res->record.recordData_buf = rr.explain_buf;
1239             srw_res->record.recordData_len = strlen(rr.explain_buf);
1240             srw_res->record.recordPosition = 0;
1241             *http_code = 200;
1242         }
1243     }
1244 }
1245
1246 static void srw_bend_scan(association *assoc, request *req,
1247                           Z_SRW_PDU *sr,
1248                           Z_SRW_scanResponse *srw_res,
1249                           int *http_code)
1250 {
1251     Z_SRW_scanRequest *srw_req = sr->u.scan_request;
1252     yaz_log(log_requestdetail, "Got SRW ScanRequest");
1253
1254     *http_code = 200;
1255     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1256     if (srw_res->num_diagnostics == 0 && assoc->init)
1257     {
1258         struct scan_entry *save_entries;
1259
1260         bend_scan_rr *bsrr = (bend_scan_rr *)
1261             odr_malloc (assoc->encode, sizeof(*bsrr));
1262         bsrr->num_bases = 1;
1263         bsrr->basenames = &srw_req->database;
1264
1265         bsrr->num_entries = srw_req->maximumTerms ?
1266             *srw_req->maximumTerms : 10;
1267         bsrr->term_position = srw_req->responsePosition ?
1268             *srw_req->responsePosition : 1;
1269
1270         bsrr->errcode = 0;
1271         bsrr->errstring = 0;
1272         bsrr->referenceId = 0;
1273         bsrr->stream = assoc->encode;
1274         bsrr->print = assoc->print;
1275         bsrr->step_size = odr_intdup(assoc->decode, 0);
1276         bsrr->entries = 0;
1277
1278         if (bsrr->num_entries > 0)
1279         {
1280             int i;
1281             bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
1282                                        bsrr->num_entries);
1283             for (i = 0; i<bsrr->num_entries; i++)
1284             {
1285                 bsrr->entries[i].term = 0;
1286                 bsrr->entries[i].occurrences = 0;
1287                 bsrr->entries[i].errcode = 0;
1288                 bsrr->entries[i].errstring = 0;
1289                 bsrr->entries[i].display_term = 0;
1290             }
1291         }
1292         save_entries = bsrr->entries;  /* save it so we can compare later */
1293
1294         if (srw_req->query_type == Z_SRW_query_type_pqf &&
1295             assoc->init->bend_scan)
1296         {
1297             Odr_oid *scan_attributeSet = 0;
1298             oident *attset;
1299             YAZ_PQF_Parser pqf_parser = yaz_pqf_create();
1300
1301             bsrr->term = yaz_pqf_scan(pqf_parser, assoc->decode,
1302                                       &scan_attributeSet,
1303                                       srw_req->scanClause.pqf);
1304             if (scan_attributeSet &&
1305                 (attset = oid_getentbyoid(scan_attributeSet)) &&
1306                 (attset->oclass == CLASS_ATTSET ||
1307                  attset->oclass == CLASS_GENERAL))
1308                 bsrr->attributeset = attset->value;
1309             else
1310                 bsrr->attributeset = VAL_NONE;
1311             yaz_pqf_destroy(pqf_parser);
1312             bsrr->scanClause = 0;
1313             ((int (*)(void *, bend_scan_rr *))
1314              (*assoc->init->bend_scan))(assoc->backend, bsrr);
1315         }
1316         else if (srw_req->query_type == Z_SRW_query_type_cql
1317                  && assoc->init->bend_scan && assoc->server
1318                  && assoc->server->cql_transform)
1319         {
1320             int srw_error;
1321             bsrr->scanClause = 0;
1322             bsrr->attributeset = VAL_NONE;
1323             bsrr->term = odr_malloc(assoc->decode, sizeof(*bsrr->term));
1324             srw_error = cql2pqf_scan(assoc->encode,
1325                                      srw_req->scanClause.cql,
1326                                      assoc->server->cql_transform,
1327                                      bsrr->term);
1328             if (srw_error)
1329                 yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1330                                        &srw_res->num_diagnostics,
1331                                        srw_error, 0);
1332             else
1333             {
1334                 ((int (*)(void *, bend_scan_rr *))
1335                  (*assoc->init->bend_scan))(assoc->backend, bsrr);
1336             }
1337         }
1338         else if (srw_req->query_type == Z_SRW_query_type_cql
1339                  && assoc->init->bend_srw_scan)
1340         {
1341             bsrr->term = 0;
1342             bsrr->attributeset = VAL_NONE;
1343             bsrr->scanClause = srw_req->scanClause.cql;
1344             ((int (*)(void *, bend_scan_rr *))
1345              (*assoc->init->bend_srw_scan))(assoc->backend, bsrr);
1346         }
1347         else
1348         {
1349             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1350                                    &srw_res->num_diagnostics,
1351                                    YAZ_SRW_UNSUPP_OPERATION, "scan");
1352         }
1353         if (bsrr->errcode)
1354         {
1355             int srw_error;
1356             if (bsrr->errcode == YAZ_BIB1_DATABASE_UNAVAILABLE)
1357             {
1358                 *http_code = 404;
1359                 return;
1360             }
1361             srw_error = yaz_diag_bib1_to_srw (bsrr->errcode);
1362
1363             yaz_add_srw_diagnostic(assoc->encode, &srw_res->diagnostics,
1364                                    &srw_res->num_diagnostics,
1365                                    srw_error, bsrr->errstring);
1366         }
1367         else if (srw_res->num_diagnostics == 0 && bsrr->num_entries)
1368         {
1369             int i;
1370             srw_res->terms = (Z_SRW_scanTerm*)
1371                 odr_malloc(assoc->encode, sizeof(*srw_res->terms) *
1372                            bsrr->num_entries);
1373
1374             srw_res->num_terms =  bsrr->num_entries;
1375             for (i = 0; i<bsrr->num_entries; i++)
1376             {
1377                 Z_SRW_scanTerm *t = srw_res->terms + i;
1378                 t->value = odr_strdup(assoc->encode, bsrr->entries[i].term);
1379                 t->numberOfRecords =
1380                     odr_intdup(assoc->encode, bsrr->entries[i].occurrences);
1381                 t->displayTerm = 0;
1382                 if (save_entries == bsrr->entries &&
1383                     bsrr->entries[i].display_term)
1384                 {
1385                     /* the entries was _not_ set by the handler. So it's
1386                        safe to test for new member display_term. It is
1387                        NULL'ed by us.
1388                     */
1389                     t->displayTerm = odr_strdup(assoc->encode,
1390                                                 bsrr->entries[i].display_term);
1391                 }
1392                 t->whereInList = 0;
1393             }
1394         }
1395     }
1396     if (log_request)
1397     {
1398         WRBUF wr = wrbuf_alloc();
1399         const char *querytype = 0;
1400         const char *querystr = 0;
1401
1402         switch(srw_req->query_type)
1403         {
1404         case Z_SRW_query_type_pqf:
1405             querytype = "PQF";
1406             querystr = srw_req->scanClause.pqf;
1407             break;
1408         case Z_SRW_query_type_cql:
1409             querytype = "CQL";
1410             querystr = srw_req->scanClause.cql;
1411             break;
1412         default:
1413             querytype = "UNKNOWN";
1414             querystr = "";
1415         }
1416
1417         wrbuf_printf(wr, "SRWScan ");
1418         wrbuf_printf(wr, srw_req->database);
1419         wrbuf_printf(wr, " ");
1420
1421         if (srw_res->num_diagnostics)
1422             wrbuf_printf(wr, "ERROR %s - ", srw_res->diagnostics[0].uri);
1423         else if (srw_res->num_terms)
1424             wrbuf_printf(wr, "OK %d - ", srw_res->num_terms);
1425         else
1426             wrbuf_printf(wr, "OK - - ");
1427
1428         wrbuf_printf(wr, "%d+%d+0 ",
1429                      (srw_req->responsePosition ?
1430                       *srw_req->responsePosition : 1),
1431                      (srw_req->maximumTerms ?
1432                       *srw_req->maximumTerms : 1));
1433         /* there is no step size in SRU/W ??? */
1434         wrbuf_printf(wr, "%s: %s ", querytype, querystr);
1435         yaz_log(log_request, "%s ", wrbuf_buf(wr) );
1436         wrbuf_free(wr, 1);
1437     }
1438
1439 }
1440
1441 static void srw_bend_update(association *assoc, request *req,
1442                             Z_SRW_PDU *sr,
1443                             Z_SRW_updateResponse *srw_res,
1444                             int *http_code)
1445 {
1446     Z_SRW_updateRequest *srw_req = sr->u.update_request;
1447     yaz_log(log_session, "SRWUpdate action=%s", srw_req->operation);
1448     yaz_log(YLOG_DEBUG, "num_diag = %d", srw_res->num_diagnostics );
1449     *http_code = 404;
1450     srw_bend_init(assoc, &srw_res->diagnostics, &srw_res->num_diagnostics, sr);
1451     if (assoc->init)
1452     {
1453         bend_update_rr rr;
1454         Z_SRW_extra_record *extra = srw_req->extra_record;
1455
1456         rr.stream = assoc->encode;
1457         rr.print = assoc->print;
1458         rr.num_bases = 1;
1459         rr.basenames = &srw_req->database;
1460         rr.operation = srw_req->operation;
1461         rr.operation_status = "failed";
1462         rr.record_id = 0;
1463         rr.record_versions = 0;
1464         rr.num_versions = 0;
1465         rr.record_packing = "string";
1466         rr.record_schema = 0;
1467         rr.record_data = 0;
1468         rr.extra_record_data = 0;
1469         rr.extra_request_data = 0;
1470         rr.extra_response_data = 0;
1471         rr.uri = 0;
1472         rr.message = 0;
1473         rr.details = 0;
1474
1475         *http_code = 200;
1476         if (rr.operation == 0)
1477         {
1478             yaz_add_sru_update_diagnostic(
1479                 assoc->encode, &srw_res->diagnostics,
1480                 &srw_res->num_diagnostics,
1481                 YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1482                 "action" );
1483             return;
1484         }
1485         yaz_log(YLOG_DEBUG, "basename = %s", rr.basenames[0] );
1486         yaz_log(YLOG_DEBUG, "Operation = %s", rr.operation );
1487         if (!strcmp( rr.operation, "delete"))
1488         {
1489             if (srw_req->record && !srw_req->record->recordSchema)
1490             {
1491                 rr.record_schema = odr_strdup(
1492                     assoc->encode,
1493                     srw_req->record->recordSchema);
1494             }
1495             if (srw_req->record)
1496             {
1497                 rr.record_data = odr_strdupn(
1498                     assoc->encode,
1499                     srw_req->record->recordData_buf,
1500                     srw_req->record->recordData_len );
1501             }
1502             if (extra && extra->extraRecordData_len)
1503             {
1504                 rr.extra_record_data = odr_strdupn(
1505                     assoc->encode,
1506                     extra->extraRecordData_buf,
1507                     extra->extraRecordData_len );
1508             }
1509             if (srw_req->recordId)
1510                 rr.record_id = srw_req->recordId;
1511             else if (extra && extra->recordIdentifier)
1512                 rr.record_id = extra->recordIdentifier;
1513         }
1514         else if (!strcmp(rr.operation, "replace"))
1515         {
1516             if (srw_req->recordId)
1517                 rr.record_id = srw_req->recordId;
1518             else if (extra && extra->recordIdentifier)
1519                 rr.record_id = extra->recordIdentifier;
1520             else
1521             {
1522                 yaz_add_sru_update_diagnostic(
1523                     assoc->encode, &srw_res->diagnostics,
1524                     &srw_res->num_diagnostics,
1525                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1526                     "recordIdentifier");
1527             }
1528             if (!srw_req->record)
1529             {
1530                 yaz_add_sru_update_diagnostic(
1531                     assoc->encode, &srw_res->diagnostics,
1532                     &srw_res->num_diagnostics,
1533                     YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1534                     "record");
1535             }
1536             else
1537             {
1538                 if (srw_req->record->recordSchema)
1539                     rr.record_schema = odr_strdup(
1540                         assoc->encode, srw_req->record->recordSchema);
1541                 if (srw_req->record->recordData_len )
1542                 {
1543                     rr.record_data = odr_strdupn(assoc->encode,
1544                                                  srw_req->record->recordData_buf,
1545                                                  srw_req->record->recordData_len );
1546                 }
1547                 else
1548                 {
1549                     yaz_add_sru_update_diagnostic(
1550                         assoc->encode, &srw_res->diagnostics,
1551                         &srw_res->num_diagnostics,
1552                         YAZ_SRU_UPDATE_MISSING_MANDATORY_ELEMENT_RECORD_REJECTED,
1553                         "recordData" );
1554                 }
1555             }
1556             if (extra && extra->extraRecordData_len)
1557             {
1558                 rr.extra_record_data = odr_strdupn(
1559                     assoc->encode,
1560                     extra->extraRecordData_buf,
1561                     extra->extraRecordData_len );
1562             }
1563         }
1564         else if (!strcmp(rr.operation, "insert"))
1565         {
1566             if (srw_req->recordId)
1567                 rr.record_id = srw_req->recordId;
1568             else if (extra)
1569                 rr.record_id = extra->recordIdentifier;
1570
1571             if (srw_req->record)
1572             {
1573                 if (srw_req->record->recordSchema)
1574                     rr.record_schema = odr_strdup(
1575                         assoc->encode, srw_req->record->recordSchema);
1576
1577                 if (srw_req->record->recordData_len)
1578                     rr.record_data = odr_strdupn(
1579                         assoc->encode,
1580                         srw_req->record->recordData_buf,
1581                         srw_req->record->recordData_len );
1582             }
1583             if (extra && extra->extraRecordData_len)
1584             {
1585                 rr.extra_record_data = odr_strdupn(
1586                     assoc->encode,
1587                     extra->extraRecordData_buf,
1588                     extra->extraRecordData_len );
1589             }
1590         }
1591         else
1592             yaz_add_sru_update_diagnostic(assoc->encode, &srw_res->diagnostics,
1593                                           &srw_res->num_diagnostics,
1594                                           YAZ_SRU_UPDATE_INVALID_ACTION,
1595                                           rr.operation );
1596
1597         if (srw_req->record)
1598         {
1599             const char *pack_str =
1600                 yaz_srw_pack_to_str(srw_req->record->recordPacking);
1601             if (pack_str)
1602                 rr.record_packing = odr_strdup(assoc->encode, pack_str);
1603         }
1604
1605         if (srw_req->num_recordVersions)
1606         {
1607             rr.record_versions = srw_req->recordVersions;
1608             rr.num_versions = srw_req->num_recordVersions;
1609         }
1610         if (srw_req->extraRequestData_len)
1611         {
1612             rr.extra_request_data = odr_strdupn(assoc->encode,
1613                                                 srw_req->extraRequestData_buf,
1614                                                 srw_req->extraRequestData_len );
1615         }
1616         if (srw_res->num_diagnostics == 0)
1617         {
1618             if ( assoc->init->bend_srw_update)
1619                 (*assoc->init->bend_srw_update)(assoc->backend, &rr);
1620             else
1621                 yaz_add_sru_update_diagnostic(
1622                     assoc->encode, &srw_res->diagnostics,
1623                     &srw_res->num_diagnostics,
1624                     YAZ_SRU_UPDATE_UNSPECIFIED_DATABASE_ERROR,
1625                     "No Update backend handler");
1626         }
1627
1628         if (rr.uri)
1629             yaz_add_srw_diagnostic_uri(assoc->encode,
1630                                        &srw_res->diagnostics,
1631                                        &srw_res->num_diagnostics,
1632                                        rr.uri,
1633                                        rr.message,
1634                                        rr.details);
1635         srw_res->recordId = rr.record_id;
1636         srw_res->operationStatus = rr.operation_status;
1637         srw_res->recordVersions = rr.record_versions;
1638         srw_res->num_recordVersions = rr.num_versions;
1639         if (srw_res->extraResponseData_len)
1640         {
1641             srw_res->extraResponseData_buf = rr.extra_response_data;
1642             srw_res->extraResponseData_len = strlen(rr.extra_response_data);
1643         }
1644         if (srw_res->num_diagnostics == 0 && rr.record_data)
1645         {
1646             srw_res->record = yaz_srw_get_record(assoc->encode);
1647             srw_res->record->recordSchema = rr.record_schema;
1648             if (rr.record_packing)
1649             {
1650                 int pack = yaz_srw_str_to_pack(rr.record_packing);
1651
1652                 if (pack == -1)
1653                 {
1654                     pack = Z_SRW_recordPacking_string;
1655                     yaz_log(YLOG_WARN, "Back packing %s from backend",
1656                             rr.record_packing);
1657                 }
1658                 srw_res->record->recordPacking = pack;
1659             }
1660             srw_res->record->recordData_buf = rr.record_data;
1661             srw_res->record->recordData_len = strlen(rr.record_data);
1662             if (rr.extra_record_data)
1663             {
1664                 Z_SRW_extra_record *ex =
1665                     yaz_srw_get_extra_record(assoc->encode);
1666                 srw_res->extra_record = ex;
1667                 ex->extraRecordData_buf = rr.extra_record_data;
1668                 ex->extraRecordData_len = strlen(rr.extra_record_data);
1669             }
1670         }
1671     }
1672 }
1673
1674 /* check if path is OK (1); BAD (0) */
1675 static int check_path(const char *path)
1676 {
1677     if (*path != '/')
1678         return 0;
1679     if (strstr(path, ".."))
1680         return 0;
1681     return 1;
1682 }
1683
1684 static char *read_file(const char *fname, ODR o, int *sz)
1685 {
1686     char *buf;
1687     FILE *inf = fopen(fname, "rb");
1688     if (!inf)
1689         return 0;
1690
1691     fseek(inf, 0L, SEEK_END);
1692     *sz = ftell(inf);
1693     rewind(inf);
1694     buf = odr_malloc(o, *sz);
1695     fread(buf, 1, *sz, inf);
1696     fclose(inf);
1697     return buf;
1698 }
1699
1700 static void process_http_request(association *assoc, request *req)
1701 {
1702     Z_HTTP_Request *hreq = req->gdu_request->u.HTTP_Request;
1703     ODR o = assoc->encode;
1704     int r = 2;  /* 2=NOT TAKEN, 1=TAKEN, 0=SOAP TAKEN */
1705     Z_SRW_PDU *sr = 0;
1706     Z_SOAP *soap_package = 0;
1707     Z_GDU *p = 0;
1708     char *charset = 0;
1709     Z_HTTP_Response *hres = 0;
1710     int keepalive = 1;
1711     const char *stylesheet = 0; /* for now .. set later */
1712     Z_SRW_diagnostic *diagnostic = 0;
1713     int num_diagnostic = 0;
1714     const char *host = z_HTTP_header_lookup(hreq->headers, "Host");
1715
1716     if (!control_association(assoc, host, 0))
1717     {
1718         p = z_get_HTTP_Response(o, 404);
1719         r = 1;
1720     }
1721     if (r == 2 && assoc->server && assoc->server->docpath
1722         && hreq->path[0] == '/'
1723         &&
1724         /* check if path is a proper prefix of documentroot */
1725         strncmp(hreq->path+1, assoc->server->docpath,
1726                 strlen(assoc->server->docpath))
1727         == 0)
1728     {
1729         if (!check_path(hreq->path))
1730         {
1731             yaz_log(YLOG_LOG, "File %s access forbidden", hreq->path+1);
1732             p = z_get_HTTP_Response(o, 404);
1733         }
1734         else
1735         {
1736             int content_size = 0;
1737             char *content_buf = read_file(hreq->path+1, o, &content_size);
1738             if (!content_buf)
1739             {
1740                 yaz_log(YLOG_LOG, "File %s not found", hreq->path+1);
1741                 p = z_get_HTTP_Response(o, 404);
1742             }
1743             else
1744             {
1745                 const char *ctype = 0;
1746                 yaz_mime_types types = yaz_mime_types_create();
1747
1748                 yaz_mime_types_add(types, "xsl", "application/xml");
1749                 yaz_mime_types_add(types, "xml", "application/xml");
1750                 yaz_mime_types_add(types, "css", "text/css");
1751                 yaz_mime_types_add(types, "html", "text/html");
1752                 yaz_mime_types_add(types, "htm", "text/html");
1753                 yaz_mime_types_add(types, "txt", "text/plain");
1754                 yaz_mime_types_add(types, "js", "application/x-javascript");
1755
1756                 yaz_mime_types_add(types, "gif", "image/gif");
1757                 yaz_mime_types_add(types, "png", "image/png");
1758                 yaz_mime_types_add(types, "jpg", "image/jpeg");
1759                 yaz_mime_types_add(types, "jpeg", "image/jpeg");
1760
1761                 ctype = yaz_mime_lookup_fname(types, hreq->path);
1762                 if (!ctype)
1763                 {
1764                     yaz_log(YLOG_LOG, "No mime type for %s", hreq->path+1);
1765                     p = z_get_HTTP_Response(o, 404);
1766                 }
1767                 else
1768                 {
1769                     p = z_get_HTTP_Response(o, 200);
1770                     hres = p->u.HTTP_Response;
1771                     hres->content_buf = content_buf;
1772                     hres->content_len = content_size;
1773                     z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1774                 }
1775                 yaz_mime_types_destroy(types);
1776             }
1777         }
1778         r = 1;
1779     }
1780
1781     if (r == 2)
1782     {
1783         r = yaz_srw_decode(hreq, &sr, &soap_package, assoc->decode, &charset);
1784         yaz_log(YLOG_DEBUG, "yaz_srw_decode returned %d", r);
1785     }
1786     if (r == 2)  /* not taken */
1787     {
1788         r = yaz_sru_decode(hreq, &sr, &soap_package, assoc->decode, &charset,
1789                            &diagnostic, &num_diagnostic);
1790         yaz_log(YLOG_DEBUG, "yaz_sru_decode returned %d", r);
1791     }
1792     if (r == 0)  /* decode SRW/SRU OK .. */
1793     {
1794         int http_code = 200;
1795         if (sr->which == Z_SRW_searchRetrieve_request)
1796         {
1797             Z_SRW_PDU *res =
1798                 yaz_srw_get(assoc->encode, Z_SRW_searchRetrieve_response);
1799
1800             stylesheet = sr->u.request->stylesheet;
1801             if (num_diagnostic)
1802             {
1803                 res->u.response->diagnostics = diagnostic;
1804                 res->u.response->num_diagnostics = num_diagnostic;
1805             }
1806             else
1807             {
1808                 srw_bend_search(assoc, req, sr, res->u.response,
1809                                 &http_code);
1810             }
1811             if (http_code == 200)
1812                 soap_package->u.generic->p = res;
1813         }
1814         else if (sr->which == Z_SRW_explain_request)
1815         {
1816             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_explain_response);
1817             stylesheet = sr->u.explain_request->stylesheet;
1818             if (num_diagnostic)
1819             {
1820                 res->u.explain_response->diagnostics = diagnostic;
1821                 res->u.explain_response->num_diagnostics = num_diagnostic;
1822             }
1823             srw_bend_explain(assoc, req, sr,
1824                              res->u.explain_response, &http_code);
1825             if (http_code == 200)
1826                 soap_package->u.generic->p = res;
1827         }
1828         else if (sr->which == Z_SRW_scan_request)
1829         {
1830             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_scan_response);
1831             stylesheet = sr->u.scan_request->stylesheet;
1832             if (num_diagnostic)
1833             {
1834                 res->u.scan_response->diagnostics = diagnostic;
1835                 res->u.scan_response->num_diagnostics = num_diagnostic;
1836             }
1837             srw_bend_scan(assoc, req, sr,
1838                           res->u.scan_response, &http_code);
1839             if (http_code == 200)
1840                 soap_package->u.generic->p = res;
1841         }
1842         else if (sr->which == Z_SRW_update_request)
1843         {
1844             Z_SRW_PDU *res = yaz_srw_get(o, Z_SRW_update_response);
1845             yaz_log(YLOG_DEBUG, "handling SRW UpdateRequest");
1846             if (num_diagnostic)
1847             {
1848                 res->u.update_response->diagnostics = diagnostic;
1849                 res->u.update_response->num_diagnostics = num_diagnostic;
1850             }
1851             yaz_log(YLOG_DEBUG, "num_diag = %d", res->u.update_response->num_diagnostics );
1852             srw_bend_update(assoc, req, sr,
1853                             res->u.update_response, &http_code);
1854             if (http_code == 200)
1855                 soap_package->u.generic->p = res;
1856         }
1857         else
1858         {
1859             yaz_log(log_request, "SOAP ERROR");
1860             /* FIXME - what error, what query */
1861             http_code = 500;
1862             z_soap_error(assoc->encode, soap_package,
1863                          "SOAP-ENV:Client", "Bad method", 0);
1864         }
1865         if (http_code == 200 || http_code == 500)
1866         {
1867             static Z_SOAP_Handler soap_handlers[4] = {
1868 #if YAZ_HAVE_XML2
1869                 {YAZ_XMLNS_SRU_v1_1, 0, (Z_SOAP_fun) yaz_srw_codec},
1870                 {YAZ_XMLNS_SRU_v1_0, 0, (Z_SOAP_fun) yaz_srw_codec},
1871                 {YAZ_XMLNS_UPDATE_v0_9, 0, (Z_SOAP_fun) yaz_ucp_codec},
1872 #endif
1873                 {0, 0, 0}
1874             };
1875             char ctype[60];
1876             int ret;
1877             p = z_get_HTTP_Response(o, 200);
1878             hres = p->u.HTTP_Response;
1879
1880             if (!stylesheet && assoc->server)
1881                 stylesheet = assoc->server->stylesheet;
1882
1883             /* empty stylesheet means NO stylesheet */
1884             if (stylesheet && *stylesheet == '\0')
1885                 stylesheet = 0;
1886
1887             ret = z_soap_codec_enc_xsl(assoc->encode, &soap_package,
1888                                        &hres->content_buf, &hres->content_len,
1889                                        soap_handlers, charset, stylesheet);
1890             hres->code = http_code;
1891
1892             strcpy(ctype, "text/xml");
1893             if (charset)
1894             {
1895                 strcat(ctype, "; charset=");
1896                 strcat(ctype, charset);
1897             }
1898             z_HTTP_header_add(o, &hres->headers, "Content-Type", ctype);
1899         }
1900         else
1901             p = z_get_HTTP_Response(o, http_code);
1902     }
1903
1904     if (p == 0)
1905         p = z_get_HTTP_Response(o, 500);
1906     hres = p->u.HTTP_Response;
1907     if (!strcmp(hreq->version, "1.0"))
1908     {
1909         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1910         if (v && !strcmp(v, "Keep-Alive"))
1911             keepalive = 1;
1912         else
1913             keepalive = 0;
1914         hres->version = "1.0";
1915     }
1916     else
1917     {
1918         const char *v = z_HTTP_header_lookup(hreq->headers, "Connection");
1919         if (v && !strcmp(v, "close"))
1920             keepalive = 0;
1921         else
1922             keepalive = 1;
1923         hres->version = "1.1";
1924     }
1925     if (!keepalive)
1926     {
1927         z_HTTP_header_add(o, &hres->headers, "Connection", "close");
1928         assoc->state = ASSOC_DEAD;
1929         assoc->cs_get_mask = 0;
1930     }
1931     else
1932     {
1933         int t;
1934         const char *alive = z_HTTP_header_lookup(hreq->headers, "Keep-Alive");
1935
1936         if (alive && isdigit(*(const unsigned char *) alive))
1937             t = atoi(alive);
1938         else
1939             t = 15;
1940         if (t < 0 || t > 3600)
1941             t = 3600;
1942         iochan_settimeout(assoc->client_chan,t);
1943         z_HTTP_header_add(o, &hres->headers, "Connection", "Keep-Alive");
1944     }
1945     process_gdu_response(assoc, req, p);
1946 }
1947
1948 static void process_gdu_request(association *assoc, request *req)
1949 {
1950     if (req->gdu_request->which == Z_GDU_Z3950)
1951     {
1952         char *msg = 0;
1953         req->apdu_request = req->gdu_request->u.z3950;
1954         if (process_z_request(assoc, req, &msg) < 0)
1955             do_close_req(assoc, Z_Close_systemProblem, msg, req);
1956     }
1957     else if (req->gdu_request->which == Z_GDU_HTTP_Request)
1958         process_http_request(assoc, req);
1959     else
1960     {
1961         do_close_req(assoc, Z_Close_systemProblem, "bad protocol packet", req);
1962     }
1963 }
1964
1965 /*
1966  * Initiate request processing.
1967  */
1968 static int process_z_request(association *assoc, request *req, char **msg)
1969 {
1970     int fd = -1;
1971     Z_APDU *res;
1972     int retval;
1973
1974     *msg = "Unknown Error";
1975     assert(req && req->state == REQUEST_IDLE);
1976     if (req->apdu_request->which != Z_APDU_initRequest && !assoc->init)
1977     {
1978         *msg = "Missing InitRequest";
1979         return -1;
1980     }
1981     switch (req->apdu_request->which)
1982     {
1983     case Z_APDU_initRequest:
1984         res = process_initRequest(assoc, req); break;
1985     case Z_APDU_searchRequest:
1986         res = process_searchRequest(assoc, req, &fd); break;
1987     case Z_APDU_presentRequest:
1988         res = process_presentRequest(assoc, req, &fd); break;
1989     case Z_APDU_scanRequest:
1990         if (assoc->init->bend_scan)
1991             res = process_scanRequest(assoc, req, &fd);
1992         else
1993         {
1994             *msg = "Cannot handle Scan APDU";
1995             return -1;
1996         }
1997         break;
1998     case Z_APDU_extendedServicesRequest:
1999         if (assoc->init->bend_esrequest)
2000             res = process_ESRequest(assoc, req, &fd);
2001         else
2002         {
2003             *msg = "Cannot handle Extended Services APDU";
2004             return -1;
2005         }
2006         break;
2007     case Z_APDU_sortRequest:
2008         if (assoc->init->bend_sort)
2009             res = process_sortRequest(assoc, req, &fd);
2010         else
2011         {
2012             *msg = "Cannot handle Sort APDU";
2013             return -1;
2014         }
2015         break;
2016     case Z_APDU_close:
2017         process_close(assoc, req);
2018         return 0;
2019     case Z_APDU_deleteResultSetRequest:
2020         if (assoc->init->bend_delete)
2021             res = process_deleteRequest(assoc, req, &fd);
2022         else
2023         {
2024             *msg = "Cannot handle Delete APDU";
2025             return -1;
2026         }
2027         break;
2028     case Z_APDU_segmentRequest:
2029         if (assoc->init->bend_segment)
2030         {
2031             res = process_segmentRequest (assoc, req);
2032         }
2033         else
2034         {
2035             *msg = "Cannot handle Segment APDU";
2036             return -1;
2037         }
2038         break;
2039     case Z_APDU_triggerResourceControlRequest:
2040         return 0;
2041     default:
2042         *msg = "Bad APDU received";
2043         return -1;
2044     }
2045     if (res)
2046     {
2047         yaz_log(YLOG_DEBUG, "  result immediately available");
2048         retval = process_z_response(assoc, req, res);
2049     }
2050     else if (fd < 0)
2051     {
2052         yaz_log(YLOG_DEBUG, "  result unavailble");
2053         retval = 0;
2054     }
2055     else /* no result yet - one will be provided later */
2056     {
2057         IOCHAN chan;
2058
2059         /* Set up an I/O handler for the fd supplied by the backend */
2060
2061         yaz_log(YLOG_DEBUG, "   establishing handler for result");
2062         req->state = REQUEST_PENDING;
2063         if (!(chan = iochan_create(fd, backend_response, EVENT_INPUT, 0)))
2064             abort();
2065         iochan_setdata(chan, assoc);
2066         retval = 0;
2067     }
2068     return retval;
2069 }
2070
2071 /*
2072  * Handle message from the backend.
2073  */
2074 void backend_response(IOCHAN i, int event)
2075 {
2076     association *assoc = (association *)iochan_getdata(i);
2077     request *req = request_head(&assoc->incoming);
2078     Z_APDU *res;
2079     int fd;
2080
2081     yaz_log(YLOG_DEBUG, "backend_response");
2082     assert(assoc && req && req->state != REQUEST_IDLE);
2083     /* determine what it is we're waiting for */
2084     switch (req->apdu_request->which)
2085     {
2086         case Z_APDU_searchRequest:
2087             res = response_searchRequest(assoc, req, 0, &fd); break;
2088 #if 0
2089         case Z_APDU_presentRequest:
2090             res = response_presentRequest(assoc, req, 0, &fd); break;
2091         case Z_APDU_scanRequest:
2092             res = response_scanRequest(assoc, req, 0, &fd); break;
2093 #endif
2094         default:
2095             yaz_log(YLOG_FATAL, "Serious programmer's lapse or bug");
2096             abort();
2097     }
2098     if ((res && process_z_response(assoc, req, res) < 0) || fd < 0)
2099     {
2100         yaz_log(YLOG_WARN, "Fatal error when talking to backend");
2101         do_close(assoc, Z_Close_systemProblem, 0);
2102         iochan_destroy(i);
2103         return;
2104     }
2105     else if (!res) /* no result yet - try again later */
2106     {
2107         yaz_log(YLOG_DEBUG, "   no result yet");
2108         iochan_setfd(i, fd); /* in case fd has changed */
2109     }
2110 }
2111
2112 /*
2113  * Encode response, and transfer the request structure to the outgoing queue.
2114  */
2115 static int process_gdu_response(association *assoc, request *req, Z_GDU *res)
2116 {
2117     odr_setbuf(assoc->encode, req->response, req->size_response, 1);
2118
2119     if (assoc->print)
2120     {
2121         if (!z_GDU(assoc->print, &res, 0, 0))
2122             yaz_log(YLOG_WARN, "ODR print error: %s",
2123                 odr_errmsg(odr_geterror(assoc->print)));
2124         odr_reset(assoc->print);
2125     }
2126     if (!z_GDU(assoc->encode, &res, 0, 0))
2127     {
2128         yaz_log(YLOG_WARN, "ODR error when encoding PDU: %s [element %s]",
2129                 odr_errmsg(odr_geterror(assoc->decode)),
2130                 odr_getelement(assoc->decode));
2131         return -1;
2132     }
2133     req->response = odr_getbuf(assoc->encode, &req->len_response,
2134         &req->size_response);
2135     odr_setbuf(assoc->encode, 0, 0, 0); /* don'txfree if we abort later */
2136     odr_reset(assoc->encode);
2137     req->state = REQUEST_IDLE;
2138     request_enq(&assoc->outgoing, req);
2139     /* turn the work over to the ir_session handler */
2140     iochan_setflag(assoc->client_chan, EVENT_OUTPUT);
2141     assoc->cs_put_mask = EVENT_OUTPUT;
2142     /* Is there more work to be done? give that to the input handler too */
2143     for (;;)
2144     {
2145         req = request_head(&assoc->incoming);
2146         if (req && req->state == REQUEST_IDLE)
2147         {
2148             request_deq(&assoc->incoming);
2149             process_gdu_request(assoc, req);
2150         }
2151         else
2152             break;
2153     }
2154     return 0;
2155 }
2156
2157 /*
2158  * Encode response, and transfer the request structure to the outgoing queue.
2159  */
2160 static int process_z_response(association *assoc, request *req, Z_APDU *res)
2161 {
2162     Z_GDU *gres = (Z_GDU *) odr_malloc(assoc->encode, sizeof(*res));
2163     gres->which = Z_GDU_Z3950;
2164     gres->u.z3950 = res;
2165
2166     return process_gdu_response(assoc, req, gres);
2167 }
2168
2169 static char *get_vhost(Z_OtherInformation *otherInfo)
2170 {
2171     return yaz_oi_get_string_oidval(&otherInfo, VAL_PROXY, 1, 0);
2172 }
2173
2174 /*
2175  * Handle init request.
2176  * At the moment, we don't check the options
2177  * anywhere else in the code - we just try not to do anything that would
2178  * break a naive client. We'll toss 'em into the association block when
2179  * we need them there.
2180  */
2181 static Z_APDU *process_initRequest(association *assoc, request *reqb)
2182 {
2183     Z_InitRequest *req = reqb->apdu_request->u.initRequest;
2184     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_initResponse);
2185     Z_InitResponse *resp = apdu->u.initResponse;
2186     bend_initresult *binitres;
2187     char *version;
2188     char options[140];
2189     statserv_options_block *cb = 0;  /* by default no control for backend */
2190
2191     if (control_association(assoc, get_vhost(req->otherInfo), 1))
2192         cb = statserv_getcontrol();  /* got control block for backend */
2193
2194     if (cb && assoc->backend)
2195         (*cb->bend_close)(assoc->backend);
2196
2197     yaz_log(log_requestdetail, "Got initRequest");
2198     if (req->implementationId)
2199         yaz_log(log_requestdetail, "Id:        %s",
2200                 req->implementationId);
2201     if (req->implementationName)
2202         yaz_log(log_requestdetail, "Name:      %s",
2203                 req->implementationName);
2204     if (req->implementationVersion)
2205         yaz_log(log_requestdetail, "Version:   %s",
2206                 req->implementationVersion);
2207
2208     assoc_init_reset(assoc);
2209
2210     assoc->init->auth = req->idAuthentication;
2211     assoc->init->referenceId = req->referenceId;
2212
2213     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel))
2214     {
2215         Z_CharSetandLanguageNegotiation *negotiation =
2216             yaz_get_charneg_record (req->otherInfo);
2217         if (negotiation &&
2218             negotiation->which == Z_CharSetandLanguageNegotiation_proposal)
2219             assoc->init->charneg_request = negotiation;
2220     }
2221
2222     assoc->backend = 0;
2223     if (cb)
2224     {
2225         if (req->implementationVersion)
2226             yaz_log(log_requestdetail, "Config:    %s",
2227                     cb->configname);
2228
2229         iochan_settimeout(assoc->client_chan, cb->idle_timeout * 60);
2230
2231         /* we have a backend control block, so call that init function */
2232         if (!(binitres = (*cb->bend_init)(assoc->init)))
2233         {
2234             yaz_log(YLOG_WARN, "Bad response from backend.");
2235             return 0;
2236         }
2237         assoc->backend = binitres->handle;
2238     }
2239     else
2240     {
2241         /* no backend. return error */
2242         binitres = odr_malloc(assoc->encode, sizeof(*binitres));
2243         binitres->errstring = 0;
2244         binitres->errcode = YAZ_BIB1_PERMANENT_SYSTEM_ERROR;
2245         iochan_settimeout(assoc->client_chan, 10);
2246     }
2247     if ((assoc->init->bend_sort))
2248         yaz_log (YLOG_DEBUG, "Sort handler installed");
2249     if ((assoc->init->bend_search))
2250         yaz_log (YLOG_DEBUG, "Search handler installed");
2251     if ((assoc->init->bend_present))
2252         yaz_log (YLOG_DEBUG, "Present handler installed");
2253     if ((assoc->init->bend_esrequest))
2254         yaz_log (YLOG_DEBUG, "ESRequest handler installed");
2255     if ((assoc->init->bend_delete))
2256         yaz_log (YLOG_DEBUG, "Delete handler installed");
2257     if ((assoc->init->bend_scan))
2258         yaz_log (YLOG_DEBUG, "Scan handler installed");
2259     if ((assoc->init->bend_segment))
2260         yaz_log (YLOG_DEBUG, "Segment handler installed");
2261
2262     resp->referenceId = req->referenceId;
2263     *options = '\0';
2264     /* let's tell the client what we can do */
2265     if (ODR_MASK_GET(req->options, Z_Options_search))
2266     {
2267         ODR_MASK_SET(resp->options, Z_Options_search);
2268         strcat(options, "srch");
2269     }
2270     if (ODR_MASK_GET(req->options, Z_Options_present))
2271     {
2272         ODR_MASK_SET(resp->options, Z_Options_present);
2273         strcat(options, " prst");
2274     }
2275     if (ODR_MASK_GET(req->options, Z_Options_delSet) &&
2276         assoc->init->bend_delete)
2277     {
2278         ODR_MASK_SET(resp->options, Z_Options_delSet);
2279         strcat(options, " del");
2280     }
2281     if (ODR_MASK_GET(req->options, Z_Options_extendedServices) &&
2282         assoc->init->bend_esrequest)
2283     {
2284         ODR_MASK_SET(resp->options, Z_Options_extendedServices);
2285         strcat (options, " extendedServices");
2286     }
2287     if (ODR_MASK_GET(req->options, Z_Options_namedResultSets))
2288     {
2289         ODR_MASK_SET(resp->options, Z_Options_namedResultSets);
2290         strcat(options, " namedresults");
2291     }
2292     if (ODR_MASK_GET(req->options, Z_Options_scan) && assoc->init->bend_scan)
2293     {
2294         ODR_MASK_SET(resp->options, Z_Options_scan);
2295         strcat(options, " scan");
2296     }
2297     if (ODR_MASK_GET(req->options, Z_Options_concurrentOperations))
2298     {
2299         ODR_MASK_SET(resp->options, Z_Options_concurrentOperations);
2300         strcat(options, " concurrop");
2301     }
2302     if (ODR_MASK_GET(req->options, Z_Options_sort) && assoc->init->bend_sort)
2303     {
2304         ODR_MASK_SET(resp->options, Z_Options_sort);
2305         strcat(options, " sort");
2306     }
2307
2308     if (ODR_MASK_GET(req->options, Z_Options_negotiationModel)
2309         && assoc->init->charneg_response)
2310     {
2311         Z_OtherInformation **p;
2312         Z_OtherInformationUnit *p0;
2313
2314         yaz_oi_APDU(apdu, &p);
2315
2316         if ((p0=yaz_oi_update(p, assoc->encode, NULL, 0, 0))) {
2317             ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2318
2319             p0->which = Z_OtherInfo_externallyDefinedInfo;
2320             p0->information.externallyDefinedInfo =
2321                 assoc->init->charneg_response;
2322         }
2323         ODR_MASK_SET(resp->options, Z_Options_negotiationModel);
2324         strcat(options, " negotiation");
2325     }
2326
2327     if (ODR_MASK_GET(req->options, Z_Options_triggerResourceCtrl))
2328         ODR_MASK_SET(resp->options, Z_Options_triggerResourceCtrl);
2329
2330     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_1))
2331     {
2332         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_1);
2333         assoc->version = 1; /* 1 & 2 are equivalent */
2334     }
2335     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_2))
2336     {
2337         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_2);
2338         assoc->version = 2;
2339     }
2340     if (ODR_MASK_GET(req->protocolVersion, Z_ProtocolVersion_3))
2341     {
2342         ODR_MASK_SET(resp->protocolVersion, Z_ProtocolVersion_3);
2343         assoc->version = 3;
2344     }
2345
2346     yaz_log(log_requestdetail, "Negotiated to v%d: %s", assoc->version, options);
2347
2348     if (*req->maximumRecordSize < assoc->maximumRecordSize)
2349         assoc->maximumRecordSize = *req->maximumRecordSize;
2350
2351     if (*req->preferredMessageSize < assoc->preferredMessageSize)
2352         assoc->preferredMessageSize = *req->preferredMessageSize;
2353
2354     resp->preferredMessageSize = &assoc->preferredMessageSize;
2355     resp->maximumRecordSize = &assoc->maximumRecordSize;
2356
2357     resp->implementationId = odr_prepend(assoc->encode,
2358                 assoc->init->implementation_id,
2359                 resp->implementationId);
2360
2361     resp->implementationName = odr_prepend(assoc->encode,
2362                 assoc->init->implementation_name,
2363                 odr_prepend(assoc->encode, "GFS", resp->implementationName));
2364
2365     version = odr_strdup(assoc->encode, "$Revision: 1.109 $");
2366     if (strlen(version) > 10)   /* check for unexpanded CVS strings */
2367         version[strlen(version)-2] = '\0';
2368     resp->implementationVersion = odr_prepend(assoc->encode,
2369                 assoc->init->implementation_version,
2370                 odr_prepend(assoc->encode, &version[11],
2371                             resp->implementationVersion));
2372
2373     if (binitres->errcode)
2374     {
2375         assoc->state = ASSOC_DEAD;
2376         resp->userInformationField =
2377             init_diagnostics(assoc->encode, binitres->errcode,
2378                              binitres->errstring);
2379         *resp->result = 0;
2380     }
2381     if (log_request)
2382     {
2383         if (!req->idAuthentication)
2384             yaz_log(log_request, "Auth none");
2385         else if (req->idAuthentication->which == Z_IdAuthentication_open)
2386         {
2387             const char *open = req->idAuthentication->u.open;
2388             const char *slash = strchr(open, '/');
2389             int len;
2390             if (slash)
2391                 len = slash - open;
2392             else
2393                 len = strlen(open);
2394                 yaz_log(log_request, "Auth open %.*s", len, open);
2395         }
2396         else if (req->idAuthentication->which == Z_IdAuthentication_idPass)
2397         {
2398             const char *user = req->idAuthentication->u.idPass->userId;
2399             const char *group = req->idAuthentication->u.idPass->groupId;
2400             yaz_log(log_request, "Auth idPass %s %s",
2401                     user ? user : "-", group ? group : "-");
2402         }
2403         else if (req->idAuthentication->which
2404                  == Z_IdAuthentication_anonymous)
2405         {
2406             yaz_log(log_request, "Auth anonymous");
2407         }
2408         else
2409         {
2410             yaz_log(log_request, "Auth other");
2411         }
2412     }
2413     if (log_request)
2414     {
2415         WRBUF wr = wrbuf_alloc();
2416         wrbuf_printf(wr, "Init ");
2417         if (binitres->errcode)
2418             wrbuf_printf(wr, "ERROR %d", binitres->errcode);
2419         else
2420             wrbuf_printf(wr, "OK -");
2421         wrbuf_printf(wr, " ID:%s Name:%s Version:%s",
2422                      (req->implementationId ? req->implementationId :"-"),
2423                      (req->implementationName ?
2424                       req->implementationName : "-"),
2425                      (req->implementationVersion ?
2426                       req->implementationVersion : "-")
2427             );
2428         yaz_log(log_request, "%s", wrbuf_buf(wr));
2429         wrbuf_free(wr, 1);
2430     }
2431     return apdu;
2432 }
2433
2434 /*
2435  * Set the specified `errcode' and `errstring' into a UserInfo-1
2436  * external to be returned to the client in accordance with Z35.90
2437  * Implementor Agreement 5 (Returning diagnostics in an InitResponse):
2438  *      http://lcweb.loc.gov/z3950/agency/agree/initdiag.html
2439  */
2440 static Z_External *init_diagnostics(ODR odr, int error, const char *addinfo)
2441 {
2442     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2443         addinfo ? " -- " : "", addinfo ? addinfo : "");
2444     return zget_init_diagnostics(odr, error, addinfo);
2445 }
2446
2447 /*
2448  * nonsurrogate diagnostic record.
2449  */
2450 static Z_Records *diagrec(association *assoc, int error, char *addinfo)
2451 {
2452     Z_Records *rec = (Z_Records *) odr_malloc (assoc->encode, sizeof(*rec));
2453
2454     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2455             addinfo ? " -- " : "", addinfo ? addinfo : "");
2456
2457     rec->which = Z_Records_NSD;
2458     rec->u.nonSurrogateDiagnostic = zget_DefaultDiagFormat(assoc->encode,
2459                                                            error, addinfo);
2460     return rec;
2461 }
2462
2463 /*
2464  * surrogate diagnostic.
2465  */
2466 static Z_NamePlusRecord *surrogatediagrec(association *assoc,
2467                                           const char *dbname,
2468                                           int error, const char *addinfo)
2469 {
2470     yaz_log(log_requestdetail, "[%d] %s%s%s", error, diagbib1_str(error),
2471             addinfo ? " -- " : "", addinfo ? addinfo : "");
2472     return zget_surrogateDiagRec(assoc->encode, dbname, error, addinfo);
2473 }
2474
2475 static Z_Records *pack_records(association *a, char *setname, int start,
2476                                int *num, Z_RecordComposition *comp,
2477                                int *next, int *pres, oid_value format,
2478                                Z_ReferenceId *referenceId,
2479                                int *oid, int *errcode)
2480 {
2481     int recno, total_length = 0, toget = *num, dumped_records = 0;
2482     Z_Records *records =
2483         (Z_Records *) odr_malloc (a->encode, sizeof(*records));
2484     Z_NamePlusRecordList *reclist =
2485         (Z_NamePlusRecordList *) odr_malloc (a->encode, sizeof(*reclist));
2486     Z_NamePlusRecord **list =
2487         (Z_NamePlusRecord **) odr_malloc (a->encode, sizeof(*list) * toget);
2488
2489     records->which = Z_Records_DBOSD;
2490     records->u.databaseOrSurDiagnostics = reclist;
2491     reclist->num_records = 0;
2492     reclist->records = list;
2493     *pres = Z_PresentStatus_success;
2494     *num = 0;
2495     *next = 0;
2496
2497     yaz_log(log_requestdetail, "Request to pack %d+%d %s", start, toget, setname);
2498     yaz_log(log_requestdetail, "pms=%d, mrs=%d", a->preferredMessageSize,
2499         a->maximumRecordSize);
2500     for (recno = start; reclist->num_records < toget; recno++)
2501     {
2502         bend_fetch_rr freq;
2503         Z_NamePlusRecord *thisrec;
2504         int this_length = 0;
2505         /*
2506          * we get the number of bytes allocated on the stream before any
2507          * allocation done by the backend - this should give us a reasonable
2508          * idea of the total size of the data so far.
2509          */
2510         total_length = odr_total(a->encode) - dumped_records;
2511         freq.errcode = 0;
2512         freq.errstring = 0;
2513         freq.basename = 0;
2514         freq.len = 0;
2515         freq.record = 0;
2516         freq.last_in_set = 0;
2517         freq.setname = setname;
2518         freq.surrogate_flag = 0;
2519         freq.number = recno;
2520         freq.comp = comp;
2521         freq.request_format = format;
2522         freq.request_format_raw = oid;
2523         freq.output_format = format;
2524         freq.output_format_raw = 0;
2525         freq.stream = a->encode;
2526         freq.print = a->print;
2527         freq.referenceId = referenceId;
2528         freq.schema = 0;
2529
2530         retrieve_fetch(a, &freq);
2531
2532         *next = freq.last_in_set ? 0 : recno + 1;
2533
2534         /* backend should be able to signal whether error is system-wide
2535            or only pertaining to current record */
2536         if (freq.errcode)
2537         {
2538             if (!freq.surrogate_flag)
2539             {
2540                 char s[20];
2541                 *pres = Z_PresentStatus_failure;
2542                 /* for 'present request out of range',
2543                    set addinfo to record position if not set */
2544                 if (freq.errcode == YAZ_BIB1_PRESENT_REQUEST_OUT_OF_RANGE  &&
2545                                 freq.errstring == 0)
2546                 {
2547                     sprintf (s, "%d", recno);
2548                     freq.errstring = s;
2549                 }
2550                 if (errcode)
2551                     *errcode = freq.errcode;
2552                 return diagrec(a, freq.errcode, freq.errstring);
2553             }
2554             reclist->records[reclist->num_records] =
2555                 surrogatediagrec(a, freq.basename, freq.errcode,
2556                                  freq.errstring);
2557             reclist->num_records++;
2558             continue;
2559         }
2560         if (freq.record == 0)  /* no error and no record ? */
2561         {
2562             *next = 0;   /* signal end-of-set and stop */
2563             break;
2564         }
2565         if (freq.len >= 0)
2566             this_length = freq.len;
2567         else
2568             this_length = odr_total(a->encode) - total_length - dumped_records;
2569         yaz_log(YLOG_DEBUG, "  fetched record, len=%d, total=%d dumped=%d",
2570             this_length, total_length, dumped_records);
2571         if (a->preferredMessageSize > 0 &&
2572                 this_length + total_length > a->preferredMessageSize)
2573         {
2574             /* record is small enough, really */
2575             if (this_length <= a->preferredMessageSize && recno > start)
2576             {
2577                 yaz_log(log_requestdetail, "  Dropped last normal-sized record");
2578                 *pres = Z_PresentStatus_partial_2;
2579                 break;
2580             }
2581             /* record can only be fetched by itself */
2582             if (this_length < a->maximumRecordSize)
2583             {
2584                 yaz_log(log_requestdetail, "  Record > prefmsgsz");
2585                 if (toget > 1)
2586                 {
2587                     yaz_log(YLOG_DEBUG, "  Dropped it");
2588                     reclist->records[reclist->num_records] =
2589                          surrogatediagrec(a, freq.basename, 16, 0);
2590                     reclist->num_records++;
2591                     dumped_records += this_length;
2592                     continue;
2593                 }
2594             }
2595             else /* too big entirely */
2596             {
2597                 yaz_log(log_requestdetail, "Record > maxrcdsz this=%d max=%d",
2598                         this_length, a->maximumRecordSize);
2599                 reclist->records[reclist->num_records] =
2600                     surrogatediagrec(a, freq.basename, 17, 0);
2601                 reclist->num_records++;
2602                 dumped_records += this_length;
2603                 continue;
2604             }
2605         }
2606
2607         if (!(thisrec = (Z_NamePlusRecord *)
2608               odr_malloc(a->encode, sizeof(*thisrec))))
2609             return 0;
2610         if (freq.basename)
2611             thisrec->databaseName = odr_strdup(a->encode, freq.basename);
2612         else
2613             thisrec->databaseName = 0;
2614         thisrec->which = Z_NamePlusRecord_databaseRecord;
2615
2616         if (freq.output_format_raw)
2617         {
2618             struct oident *ident = oid_getentbyoid(freq.output_format_raw);
2619             freq.output_format = ident->value;
2620         }
2621         thisrec->u.databaseRecord = z_ext_record(a->encode, freq.output_format,
2622                                                  freq.record, freq.len);
2623         if (!thisrec->u.databaseRecord)
2624             return 0;
2625         reclist->records[reclist->num_records] = thisrec;
2626         reclist->num_records++;
2627     }
2628     *num = reclist->num_records;
2629     return records;
2630 }
2631
2632 static Z_APDU *process_searchRequest(association *assoc, request *reqb,
2633     int *fd)
2634 {
2635     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2636     bend_search_rr *bsrr =
2637         (bend_search_rr *)nmem_malloc (reqb->request_mem, sizeof(*bsrr));
2638
2639     yaz_log(log_requestdetail, "Got SearchRequest.");
2640     bsrr->fd = fd;
2641     bsrr->request = reqb;
2642     bsrr->association = assoc;
2643     bsrr->referenceId = req->referenceId;
2644     save_referenceId (reqb, bsrr->referenceId);
2645     bsrr->srw_sortKeys = 0;
2646     bsrr->srw_setname = 0;
2647     bsrr->srw_setnameIdleTime = 0;
2648     bsrr->estimated_hit_count = 0;
2649     bsrr->partial_resultset = 0;
2650
2651     yaz_log (log_requestdetail, "ResultSet '%s'", req->resultSetName);
2652     if (req->databaseNames)
2653     {
2654         int i;
2655         for (i = 0; i < req->num_databaseNames; i++)
2656             yaz_log(log_requestdetail, "Database '%s'", req->databaseNames[i]);
2657     }
2658
2659     yaz_log_zquery_level(log_requestdetail,req->query);
2660
2661     if (assoc->init->bend_search)
2662     {
2663         bsrr->setname = req->resultSetName;
2664         bsrr->replace_set = *req->replaceIndicator;
2665         bsrr->num_bases = req->num_databaseNames;
2666         bsrr->basenames = req->databaseNames;
2667         bsrr->query = req->query;
2668         bsrr->stream = assoc->encode;
2669         nmem_transfer(bsrr->stream->mem, reqb->request_mem);
2670         bsrr->decode = assoc->decode;
2671         bsrr->print = assoc->print;
2672         bsrr->hits = 0;
2673         bsrr->errcode = 0;
2674         bsrr->errstring = NULL;
2675         bsrr->search_info = NULL;
2676
2677         if (assoc->server && assoc->server->cql_transform
2678             && req->query->which == Z_Query_type_104
2679             && req->query->u.type_104->which == Z_External_CQL)
2680         {
2681             /* have a CQL query and a CQL to PQF transform .. */
2682             int srw_errcode =
2683                 cql2pqf(bsrr->stream, req->query->u.type_104->u.cql,
2684                         assoc->server->cql_transform, bsrr->query);
2685             if (srw_errcode)
2686                 bsrr->errcode = yaz_diag_srw_to_bib1(srw_errcode);
2687         }
2688         if (!bsrr->errcode)
2689             (assoc->init->bend_search)(assoc->backend, bsrr);
2690         if (!bsrr->request)  /* backend not ready with the search response */
2691             return 0;  /* should not be used any more */
2692     }
2693     else
2694     {
2695         /* FIXME - make a diagnostic for it */
2696         yaz_log(YLOG_WARN,"Search not supported ?!?!");
2697     }
2698     return response_searchRequest(assoc, reqb, bsrr, fd);
2699 }
2700
2701 int bend_searchresponse(void *handle, bend_search_rr *bsrr) {return 0;}
2702
2703 /*
2704  * Prepare a searchresponse based on the backend results. We probably want
2705  * to look at making the fetching of records nonblocking as well, but
2706  * so far, we'll keep things simple.
2707  * If bsrt is null, that means we're called in response to a communications
2708  * event, and we'll have to get the response for ourselves.
2709  */
2710 static Z_APDU *response_searchRequest(association *assoc, request *reqb,
2711     bend_search_rr *bsrt, int *fd)
2712 {
2713     Z_SearchRequest *req = reqb->apdu_request->u.searchRequest;
2714     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2715     Z_SearchResponse *resp = (Z_SearchResponse *)
2716         odr_malloc (assoc->encode, sizeof(*resp));
2717     int *nulint = odr_intdup (assoc->encode, 0);
2718     int *next = odr_intdup(assoc->encode, 0);
2719     int *none = odr_intdup(assoc->encode, Z_SearchResponse_none);
2720     int returnedrecs = 0;
2721
2722     apdu->which = Z_APDU_searchResponse;
2723     apdu->u.searchResponse = resp;
2724     resp->referenceId = req->referenceId;
2725     resp->additionalSearchInfo = 0;
2726     resp->otherInfo = 0;
2727     *fd = -1;
2728     if (!bsrt && !bend_searchresponse(assoc->backend, bsrt))
2729     {
2730         yaz_log(YLOG_FATAL, "Bad result from backend");
2731         return 0;
2732     }
2733     else if (bsrt->errcode)
2734     {
2735         resp->records = diagrec(assoc, bsrt->errcode, bsrt->errstring);
2736         resp->resultCount = nulint;
2737         resp->numberOfRecordsReturned = nulint;
2738         resp->nextResultSetPosition = nulint;
2739         resp->searchStatus = nulint;
2740         resp->resultSetStatus = none;
2741         resp->presentStatus = 0;
2742     }
2743     else
2744     {
2745         bool_t *sr = odr_intdup(assoc->encode, 1);
2746         int *toget = odr_intdup(assoc->encode, 0);
2747         Z_RecordComposition comp, *compp = 0;
2748
2749         yaz_log (log_requestdetail, "resultCount: %d", bsrt->hits);
2750
2751         resp->records = 0;
2752         resp->resultCount = &bsrt->hits;
2753
2754         comp.which = Z_RecordComp_simple;
2755         /* how many records does the user agent want, then? */
2756         if (bsrt->hits <= *req->smallSetUpperBound)
2757         {
2758             *toget = bsrt->hits;
2759             if ((comp.u.simple = req->smallSetElementSetNames))
2760                 compp = &comp;
2761         }
2762         else if (bsrt->hits < *req->largeSetLowerBound)
2763         {
2764             *toget = *req->mediumSetPresentNumber;
2765             if (*toget > bsrt->hits)
2766                 *toget = bsrt->hits;
2767             if ((comp.u.simple = req->mediumSetElementSetNames))
2768                 compp = &comp;
2769         }
2770         else
2771             *toget = 0;
2772
2773         if (*toget && !resp->records)
2774         {
2775             oident *prefformat;
2776             oid_value form;
2777             int *presst = odr_intdup(assoc->encode, 0);
2778
2779             if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2780                 form = VAL_NONE;
2781             else
2782                 form = prefformat->value;
2783
2784             /* Call bend_present if defined */
2785             if (assoc->init->bend_present)
2786             {
2787                 bend_present_rr *bprr = (bend_present_rr *)
2788                     nmem_malloc (reqb->request_mem, sizeof(*bprr));
2789                 bprr->setname = req->resultSetName;
2790                 bprr->start = 1;
2791                 bprr->number = *toget;
2792                 bprr->format = form;
2793                 bprr->comp = compp;
2794                 bprr->referenceId = req->referenceId;
2795                 bprr->stream = assoc->encode;
2796                 bprr->print = assoc->print;
2797                 bprr->request = reqb;
2798                 bprr->association = assoc;
2799                 bprr->errcode = 0;
2800                 bprr->errstring = NULL;
2801                 (*assoc->init->bend_present)(assoc->backend, bprr);
2802
2803                 if (!bprr->request)
2804                     return 0;
2805                 if (bprr->errcode)
2806                 {
2807                     resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2808                     *resp->presentStatus = Z_PresentStatus_failure;
2809                 }
2810             }
2811
2812             if (!resp->records)
2813                 resp->records = pack_records(assoc, req->resultSetName, 1,
2814                                              toget, compp, next, presst, form, req->referenceId,
2815                                              req->preferredRecordSyntax, NULL);
2816             if (!resp->records)
2817                 return 0;
2818             resp->numberOfRecordsReturned = toget;
2819             returnedrecs = *toget;
2820             resp->presentStatus = presst;
2821         }
2822         else
2823         {
2824             if (*resp->resultCount)
2825                 *next = 1;
2826             resp->numberOfRecordsReturned = nulint;
2827             resp->presentStatus = 0;
2828         }
2829         resp->nextResultSetPosition = next;
2830         resp->searchStatus = sr;
2831         resp->resultSetStatus = 0;
2832         if (bsrt->estimated_hit_count)
2833         {
2834             resp->resultSetStatus = odr_intdup(assoc->encode,
2835                                                Z_SearchResponse_estimate);
2836         }
2837         else if (bsrt->partial_resultset)
2838         {
2839             resp->resultSetStatus = odr_intdup(assoc->encode,
2840                                                Z_SearchResponse_subset);
2841         }
2842     }
2843     resp->additionalSearchInfo = bsrt->search_info;
2844
2845     if (log_request)
2846     {
2847         int i;
2848         WRBUF wr = wrbuf_alloc();
2849
2850         for (i = 0 ; i < req->num_databaseNames; i++){
2851             if (i)
2852                 wrbuf_printf(wr, "+");
2853             wrbuf_printf(wr, req->databaseNames[i]);
2854         }
2855         wrbuf_printf(wr, " ");
2856
2857         if (bsrt->errcode)
2858             wrbuf_printf(wr, "ERROR %d", bsrt->errcode);
2859         else
2860             wrbuf_printf(wr, "OK %d", bsrt->hits);
2861         wrbuf_printf(wr, " %s 1+%d ",
2862                      req->resultSetName, returnedrecs);
2863         yaz_query_to_wrbuf(wr, req->query);
2864
2865         yaz_log(log_request, "Search %s", wrbuf_buf(wr));
2866         wrbuf_free(wr, 1);
2867     }
2868     return apdu;
2869 }
2870
2871 /*
2872  * Maybe we got a little over-friendly when we designed bend_fetch to
2873  * get only one record at a time. Some backends can optimise multiple-record
2874  * fetches, and at any rate, there is some overhead involved in
2875  * all that selecting and hopping around. Problem is, of course, that the
2876  * frontend can't know ahead of time how many records it'll need to
2877  * fill the negotiated PDU size. Annoying. Segmentation or not, Z/SR
2878  * is downright lousy as a bulk data transfer protocol.
2879  *
2880  * To start with, we'll do the fetching of records from the backend
2881  * in one operation: To save some trips in and out of the event-handler,
2882  * and to simplify the interface to pack_records. At any rate, asynch
2883  * operation is more fun in operations that have an unpredictable execution
2884  * speed - which is normally more true for search than for present.
2885  */
2886 static Z_APDU *process_presentRequest(association *assoc, request *reqb,
2887                                       int *fd)
2888 {
2889     Z_PresentRequest *req = reqb->apdu_request->u.presentRequest;
2890     oident *prefformat;
2891     oid_value form;
2892     Z_APDU *apdu;
2893     Z_PresentResponse *resp;
2894     int *next;
2895     int *num;
2896     int errcode = 0;
2897     const char *errstring = 0;
2898
2899     yaz_log(log_requestdetail, "Got PresentRequest.");
2900
2901     if (!(prefformat = oid_getentbyoid(req->preferredRecordSyntax)))
2902         form = VAL_NONE;
2903     else
2904         form = prefformat->value;
2905     resp = (Z_PresentResponse *)odr_malloc (assoc->encode, sizeof(*resp));
2906     resp->records = 0;
2907     resp->presentStatus = odr_intdup(assoc->encode, 0);
2908     if (assoc->init->bend_present)
2909     {
2910         bend_present_rr *bprr = (bend_present_rr *)
2911             nmem_malloc (reqb->request_mem, sizeof(*bprr));
2912         bprr->setname = req->resultSetId;
2913         bprr->start = *req->resultSetStartPoint;
2914         bprr->number = *req->numberOfRecordsRequested;
2915         bprr->format = form;
2916         bprr->comp = req->recordComposition;
2917         bprr->referenceId = req->referenceId;
2918         bprr->stream = assoc->encode;
2919         bprr->print = assoc->print;
2920         bprr->request = reqb;
2921         bprr->association = assoc;
2922         bprr->errcode = 0;
2923         bprr->errstring = NULL;
2924         (*assoc->init->bend_present)(assoc->backend, bprr);
2925
2926         if (!bprr->request)
2927             return 0; /* should not happen */
2928         if (bprr->errcode)
2929         {
2930             resp->records = diagrec(assoc, bprr->errcode, bprr->errstring);
2931             *resp->presentStatus = Z_PresentStatus_failure;
2932             errcode = bprr->errcode;
2933             errstring = bprr->errstring;
2934         }
2935     }
2936     apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2937     next = odr_intdup(assoc->encode, 0);
2938     num = odr_intdup(assoc->encode, 0);
2939
2940     apdu->which = Z_APDU_presentResponse;
2941     apdu->u.presentResponse = resp;
2942     resp->referenceId = req->referenceId;
2943     resp->otherInfo = 0;
2944
2945     if (!resp->records)
2946     {
2947         *num = *req->numberOfRecordsRequested;
2948         resp->records =
2949             pack_records(assoc, req->resultSetId, *req->resultSetStartPoint,
2950                          num, req->recordComposition, next,
2951                          resp->presentStatus,
2952                          form, req->referenceId, req->preferredRecordSyntax,
2953                          &errcode);
2954     }
2955     if (log_request)
2956     {
2957         WRBUF wr = wrbuf_alloc();
2958         wrbuf_printf(wr, "Present ");
2959
2960         if (*resp->presentStatus == Z_PresentStatus_failure)
2961             wrbuf_printf(wr, "ERROR %d ", errcode);
2962         else if (*resp->presentStatus == Z_PresentStatus_success)
2963             wrbuf_printf(wr, "OK -  ");
2964         else
2965             wrbuf_printf(wr, "Partial %d - ", *resp->presentStatus);
2966
2967         wrbuf_printf(wr, " %s %d+%d ",
2968                 req->resultSetId, *req->resultSetStartPoint,
2969                 *req->numberOfRecordsRequested);
2970         yaz_log(log_request, "%s", wrbuf_buf(wr) );
2971         wrbuf_free(wr, 1);
2972     }
2973     if (!resp->records)
2974         return 0;
2975     resp->numberOfRecordsReturned = num;
2976     resp->nextResultSetPosition = next;
2977
2978     return apdu;
2979 }
2980
2981 /*
2982  * Scan was implemented rather in a hurry, and with support for only the basic
2983  * elements of the service in the backend API. Suggestions are welcome.
2984  */
2985 static Z_APDU *process_scanRequest(association *assoc, request *reqb, int *fd)
2986 {
2987     Z_ScanRequest *req = reqb->apdu_request->u.scanRequest;
2988     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
2989     Z_ScanResponse *res = (Z_ScanResponse *)
2990         odr_malloc (assoc->encode, sizeof(*res));
2991     int *scanStatus = odr_intdup(assoc->encode, Z_Scan_failure);
2992     int *numberOfEntriesReturned = odr_intdup(assoc->encode, 0);
2993     Z_ListEntries *ents = (Z_ListEntries *)
2994         odr_malloc (assoc->encode, sizeof(*ents));
2995     Z_DiagRecs *diagrecs_p = NULL;
2996     oident *attset;
2997     bend_scan_rr *bsrr = (bend_scan_rr *)
2998         odr_malloc (assoc->encode, sizeof(*bsrr));
2999     struct scan_entry *save_entries;
3000
3001     yaz_log(log_requestdetail, "Got ScanRequest");
3002
3003     apdu->which = Z_APDU_scanResponse;
3004     apdu->u.scanResponse = res;
3005     res->referenceId = req->referenceId;
3006
3007     /* if step is absent, set it to 0 */
3008     res->stepSize = odr_intdup(assoc->encode, 0);
3009     if (req->stepSize)
3010         *res->stepSize = *req->stepSize;
3011
3012     res->scanStatus = scanStatus;
3013     res->numberOfEntriesReturned = numberOfEntriesReturned;
3014     res->positionOfTerm = 0;
3015     res->entries = ents;
3016     ents->num_entries = 0;
3017     ents->entries = NULL;
3018     ents->num_nonsurrogateDiagnostics = 0;
3019     ents->nonsurrogateDiagnostics = NULL;
3020     res->attributeSet = 0;
3021     res->otherInfo = 0;
3022
3023     if (req->databaseNames)
3024     {
3025         int i;
3026         for (i = 0; i < req->num_databaseNames; i++)
3027             yaz_log (log_requestdetail, "Database '%s'", req->databaseNames[i]);
3028     }
3029     bsrr->scanClause = 0;
3030     bsrr->errcode = 0;
3031     bsrr->errstring = 0;
3032     bsrr->num_bases = req->num_databaseNames;
3033     bsrr->basenames = req->databaseNames;
3034     bsrr->num_entries = *req->numberOfTermsRequested;
3035     bsrr->term = req->termListAndStartPoint;
3036     bsrr->referenceId = req->referenceId;
3037     bsrr->stream = assoc->encode;
3038     bsrr->print = assoc->print;
3039     bsrr->step_size = res->stepSize;
3040     bsrr->entries = 0;
3041     /* For YAZ 2.0 and earlier it was the backend handler that
3042        initialized entries (member display_term did not exist)
3043        YAZ 2.0 and later sets 'entries'  and initialize all members
3044        including 'display_term'. If YAZ 2.0 or later sees that
3045        entries was modified - we assume that it is an old handler and
3046        that 'display_term' is _not_ set.
3047     */
3048     if (bsrr->num_entries > 0)
3049     {
3050         int i;
3051         bsrr->entries = odr_malloc(assoc->decode, sizeof(*bsrr->entries) *
3052                                    bsrr->num_entries);
3053         for (i = 0; i<bsrr->num_entries; i++)
3054         {
3055             bsrr->entries[i].term = 0;
3056             bsrr->entries[i].occurrences = 0;
3057             bsrr->entries[i].errcode = 0;
3058             bsrr->entries[i].errstring = 0;
3059             bsrr->entries[i].display_term = 0;
3060         }
3061     }
3062     save_entries = bsrr->entries;  /* save it so we can compare later */
3063
3064     if (req->attributeSet &&
3065         (attset = oid_getentbyoid(req->attributeSet)) &&
3066         (attset->oclass == CLASS_ATTSET || attset->oclass == CLASS_GENERAL))
3067         bsrr->attributeset = attset->value;
3068     else
3069         bsrr->attributeset = VAL_NONE;
3070     log_scan_term_level (log_requestdetail, req->termListAndStartPoint,
3071             bsrr->attributeset);
3072     bsrr->term_position = req->preferredPositionInResponse ?
3073         *req->preferredPositionInResponse : 1;
3074
3075     ((int (*)(void *, bend_scan_rr *))
3076      (*assoc->init->bend_scan))(assoc->backend, bsrr);
3077
3078     if (bsrr->errcode)
3079         diagrecs_p = zget_DiagRecs(assoc->encode,
3080                                    bsrr->errcode, bsrr->errstring);
3081     else
3082     {
3083         int i;
3084         Z_Entry **tab = (Z_Entry **)
3085             odr_malloc (assoc->encode, sizeof(*tab) * bsrr->num_entries);
3086
3087         if (bsrr->status == BEND_SCAN_PARTIAL)
3088             *scanStatus = Z_Scan_partial_5;
3089         else
3090             *scanStatus = Z_Scan_success;
3091         ents->entries = tab;
3092         ents->num_entries = bsrr->num_entries;
3093         res->numberOfEntriesReturned = &ents->num_entries;
3094         res->positionOfTerm = &bsrr->term_position;
3095         for (i = 0; i < bsrr->num_entries; i++)
3096         {
3097             Z_Entry *e;
3098             Z_TermInfo *t;
3099             Odr_oct *o;
3100
3101             tab[i] = e = (Z_Entry *)odr_malloc(assoc->encode, sizeof(*e));
3102             if (bsrr->entries[i].occurrences >= 0)
3103             {
3104                 e->which = Z_Entry_termInfo;
3105                 e->u.termInfo = t = (Z_TermInfo *)
3106                     odr_malloc(assoc->encode, sizeof(*t));
3107                 t->suggestedAttributes = 0;
3108                 t->displayTerm = 0;
3109                 if (save_entries == bsrr->entries &&
3110                     bsrr->entries[i].display_term)
3111                 {
3112                     /* the entries was _not_ set by the handler. So it's
3113                        safe to test for new member display_term. It is
3114                        NULL'ed by us.
3115                     */
3116                     t->displayTerm = odr_strdup(assoc->encode,
3117                                                 bsrr->entries[i].display_term);
3118                 }
3119                 t->alternativeTerm = 0;
3120                 t->byAttributes = 0;
3121                 t->otherTermInfo = 0;
3122                 t->globalOccurrences = &bsrr->entries[i].occurrences;
3123                 t->term = (Z_Term *)
3124                     odr_malloc(assoc->encode, sizeof(*t->term));
3125                 t->term->which = Z_Term_general;
3126                 t->term->u.general = o =
3127                     (Odr_oct *)odr_malloc(assoc->encode, sizeof(Odr_oct));
3128                 o->buf = (unsigned char *)
3129                     odr_malloc(assoc->encode, o->len = o->size =
3130                                strlen(bsrr->entries[i].term));
3131                 memcpy(o->buf, bsrr->entries[i].term, o->len);
3132                 yaz_log(YLOG_DEBUG, "  term #%d: '%s' (%d)", i,
3133                          bsrr->entries[i].term, bsrr->entries[i].occurrences);
3134             }
3135             else
3136             {
3137                 Z_DiagRecs *drecs = zget_DiagRecs(assoc->encode,
3138                                                   bsrr->entries[i].errcode,
3139                                                   bsrr->entries[i].errstring);
3140                 assert (drecs->num_diagRecs == 1);
3141                 e->which = Z_Entry_surrogateDiagnostic;
3142                 assert (drecs->diagRecs[0]);
3143                 e->u.surrogateDiagnostic = drecs->diagRecs[0];
3144             }
3145         }
3146     }
3147     if (diagrecs_p)
3148     {
3149         ents->num_nonsurrogateDiagnostics = diagrecs_p->num_diagRecs;
3150         ents->nonsurrogateDiagnostics = diagrecs_p->diagRecs;
3151     }
3152     if (log_request)
3153     {
3154         int i;
3155         WRBUF wr = wrbuf_alloc();
3156         wrbuf_printf(wr, "Scan ");
3157         for (i = 0 ; i < req->num_databaseNames; i++){
3158             if (i)
3159                 wrbuf_printf(wr, "+");
3160             wrbuf_printf(wr, req->databaseNames[i]);
3161         }
3162         wrbuf_printf(wr, " ");
3163
3164         if (bsrr->errcode){
3165             wr_diag(wr, bsrr->errcode, bsrr->errstring);
3166             wrbuf_printf(wr, " ");
3167         }
3168         else
3169             wrbuf_printf(wr, "OK ");
3170         /* else if (*res->scanStatus == Z_Scan_success) */
3171         /*    wrbuf_printf(wr, "OK "); */
3172         /* else */
3173         /* wrbuf_printf(wr, "Partial "); */
3174
3175         if (*res->numberOfEntriesReturned)
3176             wrbuf_printf(wr, "%d - ", *res->numberOfEntriesReturned);
3177         else
3178             wrbuf_printf(wr, "0 - ");
3179
3180         wrbuf_printf(wr, "%d+%d+%d ",
3181                      (req->preferredPositionInResponse ?
3182                       *req->preferredPositionInResponse : 1),
3183                      *req->numberOfTermsRequested,
3184                      (res->stepSize ? *res->stepSize : 1));
3185
3186         yaz_scan_to_wrbuf(wr, req->termListAndStartPoint,
3187                           bsrr->attributeset);
3188         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3189         wrbuf_free(wr, 1);
3190     }
3191     return apdu;
3192 }
3193
3194 static Z_APDU *process_sortRequest(association *assoc, request *reqb,
3195     int *fd)
3196 {
3197     int i;
3198     Z_SortRequest *req = reqb->apdu_request->u.sortRequest;
3199     Z_SortResponse *res = (Z_SortResponse *)
3200         odr_malloc (assoc->encode, sizeof(*res));
3201     bend_sort_rr *bsrr = (bend_sort_rr *)
3202         odr_malloc (assoc->encode, sizeof(*bsrr));
3203
3204     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3205
3206     yaz_log(log_requestdetail, "Got SortRequest.");
3207
3208     bsrr->num_input_setnames = req->num_inputResultSetNames;
3209     for (i=0;i<req->num_inputResultSetNames;i++)
3210         yaz_log(log_requestdetail, "Input resultset: '%s'",
3211                 req->inputResultSetNames[i]);
3212     bsrr->input_setnames = req->inputResultSetNames;
3213     bsrr->referenceId = req->referenceId;
3214     bsrr->output_setname = req->sortedResultSetName;
3215     yaz_log(log_requestdetail, "Output resultset: '%s'",
3216                 req->sortedResultSetName);
3217     bsrr->sort_sequence = req->sortSequence;
3218        /*FIXME - dump those sequences too */
3219     bsrr->stream = assoc->encode;
3220     bsrr->print = assoc->print;
3221
3222     bsrr->sort_status = Z_SortResponse_failure;
3223     bsrr->errcode = 0;
3224     bsrr->errstring = 0;
3225
3226     (*assoc->init->bend_sort)(assoc->backend, bsrr);
3227
3228     res->referenceId = bsrr->referenceId;
3229     res->sortStatus = odr_intdup(assoc->encode, bsrr->sort_status);
3230     res->resultSetStatus = 0;
3231     if (bsrr->errcode)
3232     {
3233         Z_DiagRecs *dr = zget_DiagRecs(assoc->encode,
3234                                        bsrr->errcode, bsrr->errstring);
3235         res->diagnostics = dr->diagRecs;
3236         res->num_diagnostics = dr->num_diagRecs;
3237     }
3238     else
3239     {
3240         res->num_diagnostics = 0;
3241         res->diagnostics = 0;
3242     }
3243     res->resultCount = 0;
3244     res->otherInfo = 0;
3245
3246     apdu->which = Z_APDU_sortResponse;
3247     apdu->u.sortResponse = res;
3248     if (log_request)
3249     {
3250         WRBUF wr = wrbuf_alloc();
3251         wrbuf_printf(wr, "Sort ");
3252         if (bsrr->errcode)
3253             wrbuf_printf(wr, " ERROR %d", bsrr->errcode);
3254         else
3255             wrbuf_printf(wr,  "OK -");
3256         wrbuf_printf(wr, " (");
3257         for (i = 0; i<req->num_inputResultSetNames; i++)
3258         {
3259             if (i)
3260                 wrbuf_printf(wr, "+");
3261             wrbuf_printf(wr, req->inputResultSetNames[i]);
3262         }
3263         wrbuf_printf(wr, ")->%s ",req->sortedResultSetName);
3264
3265         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3266         wrbuf_free(wr, 1);
3267     }
3268     return apdu;
3269 }
3270
3271 static Z_APDU *process_deleteRequest(association *assoc, request *reqb,
3272     int *fd)
3273 {
3274     int i;
3275     Z_DeleteResultSetRequest *req =
3276         reqb->apdu_request->u.deleteResultSetRequest;
3277     Z_DeleteResultSetResponse *res = (Z_DeleteResultSetResponse *)
3278         odr_malloc (assoc->encode, sizeof(*res));
3279     bend_delete_rr *bdrr = (bend_delete_rr *)
3280         odr_malloc (assoc->encode, sizeof(*bdrr));
3281     Z_APDU *apdu = (Z_APDU *)odr_malloc (assoc->encode, sizeof(*apdu));
3282
3283     yaz_log(log_requestdetail, "Got DeleteRequest.");
3284
3285     bdrr->num_setnames = req->num_resultSetList;
3286     bdrr->setnames = req->resultSetList;
3287     for (i = 0; i<req->num_resultSetList; i++)
3288         yaz_log(log_requestdetail, "resultset: '%s'",
3289                 req->resultSetList[i]);
3290     bdrr->stream = assoc->encode;
3291     bdrr->print = assoc->print;
3292     bdrr->function = *req->deleteFunction;
3293     bdrr->referenceId = req->referenceId;
3294     bdrr->statuses = 0;
3295     if (bdrr->num_setnames > 0)
3296     {
3297         bdrr->statuses = (int*)
3298             odr_malloc(assoc->encode, sizeof(*bdrr->statuses) *
3299                        bdrr->num_setnames);
3300         for (i = 0; i < bdrr->num_setnames; i++)
3301             bdrr->statuses[i] = 0;
3302     }
3303     (*assoc->init->bend_delete)(assoc->backend, bdrr);
3304
3305     res->referenceId = req->referenceId;
3306
3307     res->deleteOperationStatus = odr_intdup(assoc->encode,bdrr->delete_status);
3308
3309     res->deleteListStatuses = 0;
3310     if (bdrr->num_setnames > 0)
3311     {
3312         int i;
3313         res->deleteListStatuses = (Z_ListStatuses *)
3314             odr_malloc(assoc->encode, sizeof(*res->deleteListStatuses));
3315         res->deleteListStatuses->num = bdrr->num_setnames;
3316         res->deleteListStatuses->elements =
3317             (Z_ListStatus **)
3318             odr_malloc (assoc->encode,
3319                         sizeof(*res->deleteListStatuses->elements) *
3320                         bdrr->num_setnames);
3321         for (i = 0; i<bdrr->num_setnames; i++)
3322         {
3323             res->deleteListStatuses->elements[i] =
3324                 (Z_ListStatus *)
3325                 odr_malloc (assoc->encode,
3326                             sizeof(**res->deleteListStatuses->elements));
3327             res->deleteListStatuses->elements[i]->status = bdrr->statuses+i;
3328             res->deleteListStatuses->elements[i]->id =
3329                 odr_strdup (assoc->encode, bdrr->setnames[i]);
3330         }
3331     }
3332     res->numberNotDeleted = 0;
3333     res->bulkStatuses = 0;
3334     res->deleteMessage = 0;
3335     res->otherInfo = 0;
3336
3337     apdu->which = Z_APDU_deleteResultSetResponse;
3338     apdu->u.deleteResultSetResponse = res;
3339     if (log_request)
3340     {
3341         WRBUF wr = wrbuf_alloc();
3342         wrbuf_printf(wr, "Delete ");
3343         if (bdrr->delete_status)
3344             wrbuf_printf(wr, "ERROR %d", bdrr->delete_status);
3345         else
3346             wrbuf_printf(wr, "OK -");
3347         for (i = 0; i<req->num_resultSetList; i++)
3348             wrbuf_printf(wr, " %s ", req->resultSetList[i]);
3349         yaz_log(log_request, "%s", wrbuf_buf(wr) );
3350         wrbuf_free(wr, 1);
3351     }
3352     return apdu;
3353 }
3354
3355 static void process_close(association *assoc, request *reqb)
3356 {
3357     Z_Close *req = reqb->apdu_request->u.close;
3358     static char *reasons[] =
3359     {
3360         "finished",
3361         "shutdown",
3362         "systemProblem",
3363         "costLimit",
3364         "resources",
3365         "securityViolation",
3366         "protocolError",
3367         "lackOfActivity",
3368         "peerAbort",
3369         "unspecified"
3370     };
3371
3372     yaz_log(log_requestdetail, "Got Close, reason %s, message %s",
3373         reasons[*req->closeReason], req->diagnosticInformation ?
3374         req->diagnosticInformation : "NULL");
3375     if (assoc->version < 3) /* to make do_force respond with close */
3376         assoc->version = 3;
3377     do_close_req(assoc, Z_Close_finished,
3378                  "Association terminated by client", reqb);
3379     yaz_log(log_request,"Close OK");
3380 }
3381
3382 void save_referenceId (request *reqb, Z_ReferenceId *refid)
3383 {
3384     if (refid)
3385     {
3386         reqb->len_refid = refid->len;
3387         reqb->refid = (char *)nmem_malloc (reqb->request_mem, refid->len);
3388         memcpy (reqb->refid, refid->buf, refid->len);
3389     }
3390     else
3391     {
3392         reqb->len_refid = 0;
3393         reqb->refid = NULL;
3394     }
3395 }
3396
3397 void bend_request_send (bend_association a, bend_request req, Z_APDU *res)
3398 {
3399     process_z_response (a, req, res);
3400 }
3401
3402 bend_request bend_request_mk (bend_association a)
3403 {
3404     request *nreq = request_get (&a->outgoing);
3405     nreq->request_mem = nmem_create ();
3406     return nreq;
3407 }
3408
3409 Z_ReferenceId *bend_request_getid (ODR odr, bend_request req)
3410 {
3411     Z_ReferenceId *id;
3412     if (!req->refid)
3413         return 0;
3414     id = (Odr_oct *)odr_malloc (odr, sizeof(*odr));
3415     id->buf = (unsigned char *)odr_malloc (odr, req->len_refid);
3416     id->len = id->size = req->len_refid;
3417     memcpy (id->buf, req->refid, req->len_refid);
3418     return id;
3419 }
3420
3421 void bend_request_destroy (bend_request *req)
3422 {
3423     nmem_destroy((*req)->request_mem);
3424     request_release(*req);
3425     *req = NULL;
3426 }
3427
3428 int bend_backend_respond (bend_association a, bend_request req)
3429 {
3430     char *msg;
3431     int r;
3432     r = process_z_request (a, req, &msg);
3433     if (r < 0)
3434         yaz_log (YLOG_WARN, "%s", msg);
3435     return r;
3436 }
3437
3438 void bend_request_setdata(bend_request r, void *p)
3439 {
3440     r->clientData = p;
3441 }
3442
3443 void *bend_request_getdata(bend_request r)
3444 {
3445     return r->clientData;
3446 }
3447
3448 static Z_APDU *process_segmentRequest (association *assoc, request *reqb)
3449 {
3450     bend_segment_rr req;
3451
3452     req.segment = reqb->apdu_request->u.segmentRequest;
3453     req.stream = assoc->encode;
3454     req.decode = assoc->decode;
3455     req.print = assoc->print;
3456     req.association = assoc;
3457
3458     (*assoc->init->bend_segment)(assoc->backend, &req);
3459
3460     return 0;
3461 }
3462
3463 static Z_APDU *process_ESRequest(association *assoc, request *reqb, int *fd)
3464 {
3465     bend_esrequest_rr esrequest;
3466     const char *ext_name = "unknown";
3467
3468     Z_ExtendedServicesRequest *req =
3469         reqb->apdu_request->u.extendedServicesRequest;
3470     Z_APDU *apdu = zget_APDU(assoc->encode, Z_APDU_extendedServicesResponse);
3471
3472     Z_ExtendedServicesResponse *resp = apdu->u.extendedServicesResponse;
3473
3474     esrequest.esr = reqb->apdu_request->u.extendedServicesRequest;
3475     esrequest.stream = assoc->encode;
3476     esrequest.decode = assoc->decode;
3477     esrequest.print = assoc->print;
3478     esrequest.errcode = 0;
3479     esrequest.errstring = NULL;
3480     esrequest.request = reqb;
3481     esrequest.association = assoc;
3482     esrequest.taskPackage = 0;
3483     esrequest.referenceId = req->referenceId;
3484
3485
3486     if (esrequest.esr && esrequest.esr->taskSpecificParameters)
3487     {
3488         switch(esrequest.esr->taskSpecificParameters->which)
3489         {
3490         case Z_External_itemOrder:
3491             ext_name = "ItemOrder"; break;
3492         case Z_External_update:
3493             ext_name = "Update"; break;
3494         case Z_External_update0:
3495             ext_name = "Update0"; break;
3496         case Z_External_ESAdmin:
3497             ext_name = "Admin"; break;
3498
3499         }
3500     }
3501
3502     (*assoc->init->bend_esrequest)(assoc->backend, &esrequest);
3503
3504     /* If the response is being delayed, return NULL */
3505     if (esrequest.request == NULL)
3506         return(NULL);
3507
3508     resp->referenceId = req->referenceId;
3509
3510     if (esrequest.errcode == -1)
3511     {
3512         /* Backend service indicates request will be processed */
3513         yaz_log(log_request, "Extended Service: %s (accepted)", ext_name);
3514         *resp->operationStatus = Z_ExtendedServicesResponse_accepted;
3515     }
3516     else if (esrequest.errcode == 0)
3517     {
3518         /* Backend service indicates request will be processed */
3519         yaz_log(log_request, "Extended Service: %s (done)", ext_name);
3520         *resp->operationStatus = Z_ExtendedServicesResponse_done;
3521     }
3522     else
3523     {
3524         Z_DiagRecs *diagRecs =
3525             zget_DiagRecs(assoc->encode, esrequest.errcode,
3526                           esrequest.errstring);
3527         /* Backend indicates error, request will not be processed */
3528         yaz_log(log_request, "Extended Service: %s (failed)", ext_name);
3529         *resp->operationStatus = Z_ExtendedServicesResponse_failure;
3530         resp->num_diagnostics = diagRecs->num_diagRecs;
3531         resp->diagnostics = diagRecs->diagRecs;
3532         if (log_request)
3533         {
3534             WRBUF wr = wrbuf_alloc();
3535             wrbuf_diags(wr, resp->num_diagnostics, resp->diagnostics);
3536             yaz_log(log_request, "EsRequest %s", wrbuf_buf(wr) );
3537             wrbuf_free(wr, 1);
3538         }
3539
3540     }
3541     /* Do something with the members of bend_extendedservice */
3542     if (esrequest.taskPackage)
3543         resp->taskPackage = z_ext_record (assoc->encode, VAL_EXTENDED,
3544                                          (const char *)  esrequest.taskPackage,
3545                                           -1);
3546     yaz_log(YLOG_DEBUG,"Send the result apdu");
3547     return apdu;
3548 }
3549
3550 int bend_assoc_is_alive(bend_association assoc)
3551 {
3552     if (assoc->state == ASSOC_DEAD)
3553         return 0; /* already marked as dead. Don't check I/O chan anymore */
3554
3555     return iochan_is_alive(assoc->client_chan);
3556 }
3557
3558
3559 /*
3560  * Local variables:
3561  * c-basic-offset: 4
3562  * indent-tabs-mode: nil
3563  * End:
3564  * vim: shiftwidth=4 tabstop=8 expandtab
3565  */
3566